Question

third proportional to 9 and -12 ? is 16 how

Answer 1

let the third proportional to 9 and -13 be x
therefore
9÷-12=-12÷x
cross-multiplying it,we get
9x=144
x=144÷9
=16
so 3rd proportional to 9 and -12 is 16

Answer 2

$\huge\underline\mathfrak\green{Solution:-}$

$\huge\mathrm\red{Question:-}$

• What is the third proportional to 9 and 12?

$\huge\mathrm\pink{Answer:-}$

• 16 is the third proportional to 9 and 12.

$\huge\mathrm\orange{Explanation:-}$

Let third proportion = x

∴ 9:12 :: 12:x

⟹ 9x = 12×12

⟹ x = 16

$\huge\mathrm\purple{=\:16\:Ans}$