Question

find the mean proportion between 21 and 84
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Answer 1

The mean proportion between 21 and 84 is the number n in the equation.

21/n=n/84

solving for n by cross multiplication

(n)(n)=(21)(84)

n^2=(21)×4×21

n^2=(21)^2×4

root n^2=root 2^2(21)^2

=root2^2×root21^2

=(2)(21)

n=41.

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Answer 2

Answer:

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