Question

find the third proportional to 9 and 48​

Answer 1

Answer:

The third proportion of 9 and 12 is written as 9:x::x:12, or

x^2 = 108, or x = 108^0.5 = 10.39230485. That is to say

9:10.39230485 :: 10.39230485:12

The answer is 10.39230485.

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