Suppose 12 is the GM of 16 and x
then 12 = sqrt(16*x)
squaring both sides: 144 = 16*x
so that x = 9
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Geometric mean of 9 and 16 is 12. Look at link: "Calculation of the geometric mean of two numbers".
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The geometric mean of 9 and 16 = square root of (9 x 16) = square root of 144 = 12.
16. Geometric mean of two numbers is the square root of their product.
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