Question

Find the fourth proportional to 3.6, 6.9 and 11.4​

Answer 1

Answer:

here product of means=product of extremes.

Answer 2

The fourth proportional to 3.6, 6.9 and 11.4​ is 21.85.

Step-by-step explanation:

To find : The fourth proportional to 3.6, 6.9 and 11.4​ ?

Solution :

Let the fourth proportion be 'x'.

So, 3.6, 6.9 and 11.4,x are proportional.

i.e. $3.6:6.9::11.4:x$

$\frac{3.6}{6.9} =\frac{11.4}{x}$

$x=\frac{11.4\times 6.9}{3.6}$

$x=21.85$

Therefore, the fourth proportional to 3.6, 6.9 and 11.4​ is 21.85.

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