Question

Determine if the following numbers are in proportion.

$2,9,6,27$

Answer 1

If $a,b,c,d$are in proportion then,

$a\times d=b\times c$

So, here we have $2,9,6,27$

in which

$a=2,b=9,c=6,d=27$

now, $2\times 27=54$

and, $9\times 6=54$

Hence $a\times d=b\times c$

So, $2,9,6,27$ are in proportion.