Question

The mean proportional between 9 and 12​

Answer 1

Step-by-step explanation:

• Let the means be x

~> ★ 9 : x : : x 12 ★ <~

★ Mean × Mean = Extreme × Extreme

$\bf{\implies} \: x \times x = 9 \times 12$

$\bf{\implies} \: {x}^{2} = 108$

$\bf{\implies} \: x = \sqrt{108}$

$\bf{\implies} \:x = 10.3$

.°. The answer is 10.3

Answer 2

Step-by-step explanation:

10.3

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