Question

Find the Mean Proportion Between 18 and 72 . i need expert answer​

Answer 1

Answer:

Let the mean proportion of 18 and 72 = x

So 18:x = x:72

\begin{gathered} \frac{18}{x} = \frac{x}{72} \\ \\ by \: cross \: multiplication \\ \\ 18 \times 72 = x \times x \\ \\ {x}^{2} = 18 \times 72 \\ \\ x = \sqrt{18 \times 72} = \sqrt{18 \times 18 \times 2 \times 2} \\ \\ x = 18 \times 2 \\ \\ x = 36\end{gathered}

x

18

=

72

x

bycrossmultiplication

18×72=x×x

x

2

=18×72

x=

18×72

=

18×18×2×2

x=18×2

x=36

mean proportion is 36.

Answer 2

Answer:

36

Step-by-step explanation:

Mean proportion is sqrt of product of no.s

therefore,

    18*72 = 1296

Sq.rt (1296) = 36