## anonymous one year ago Find the mean proportional (geometric mean) of 15 and 20.

1. anonymous

Ok for this one I don't know what to do

2. anonymous

ok. i have other questions let me try to see if i can get help with this one.

3. anonymous

the geometric mean of two of two numbers is the square root of their product for instance the geometric mean of 2 and 8 is $\sqrt{2*8}= \sqrt{16}$

4. anonymous

Can you solve your problem now?

5. anonymous

so $SO \it would be \sqrt{15*20}$

6. anonymous

?

7. anonymous

8. anonymous

Yes.

9. anonymous

Thanks

10. anonymous

as the formula for geometric mean is $\sqrt[n]{a _{1}a _{2}a _{3}...a _{n}}$