SOLUTION: What is the geometric mean of 12 and 20 rounded to the nearest tenth?

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Question 1036086: What is the geometric mean of 12 and 20 rounded to the nearest tenth?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
We find it via this proportion:
12%2Fx+=+x%2F20
x%5E2+=+240 and
x = 15.5 (a bit less actually)