What is the means proportional between 4 and 81

Jack Guo asked Jul 9, 2023

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Jack Guo asked Jul 9, 2023

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21 votes

Given

Procedure

The mean proportional, or geometric mean, of two positive The mean proportional, or geometric mean, of two positive

When solving

$\begin{gathered} x=\sqrt[]{a\cdot b} \\ x=\sqrt[]{4\cdot81} \\ x=\sqrt[]{324} \\ x=18 \end{gathered}$

The answer would be 18

Joshua Dance answered Jul 15, 2023

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