## anonymous one year ago On a sunny day, a 5-foot red kangaroo casts a shadow this is 7 feet long. The shadow of a nearly eucalyptus tree is 35 feet long. Write and solve a proportion to find the height of the tree. Pleaseee help!!!!

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1. BloomLocke367

Do you know what a proportion is?

2. anonymous

Yes but can u explain cause I kinda forgot

3. anonymous

@bloomlocke367

4. BloomLocke367

Okay, a proportion is hmmmm I'm trying to think of how to explain this. It's something that normally compares two things that are either part to whole or part to part. For this particular problem, you'd set one up comparing height of the figure, to how long the shadow is.

5. anonymous

|dw:1440959648712:dw|

6. anonymous

the tree is 49 feet tall

7. BloomLocke367

So you'd have $$\large\tt \frac{height~of~kangaroo}{length~of~kangaroo~shadow}= \frac{height~of~tree}{length~of~tree~shadow}$$

8. BloomLocke367

I don't know why the spacing didn't work. :/

9. anonymous

But how do u exactly solve this?

10. anonymous

my picture!

11. BloomLocke367

Well, first plug in your values. They have to match up

12. anonymous

nevermind i fuced up

13. anonymous

do my picture but use BloomLockes formula

14. BloomLocke367

After you set up your proportion, you cross multiply and divide.

15. BloomLocke367

I'll explain once you come up with the proportion.

16. anonymous

yeah math

17. anonymous

What is the other proportion on the other side is it 35/7 cause the denominator stays the same?

18. BloomLocke367

I don't understand what you're asking :/ What are you confused about?

19. anonymous

Is 5/7 the first step right?

20. BloomLocke367

Given the model I gave you, you should have: $$\huge\frac{5}{7}=\frac{?}{35}$$

21. anonymous

Ok yea

22. BloomLocke367

You're trying to find the missing piece. To do that, you cross multiply 5 and 35 and then you take that product and divide it by 7.

23. anonymous

I got 25

24. BloomLocke367

Correct! Great job. Do you understand now?

25. BloomLocke367

@Jazzyjose8

26. anonymous

Yes thank you so much I had problems with cross multiplying I get be4 wait so 25 is the numerator and 35 is the denominator?