Question

Are the following number in proportion$?$

$15,45,5,25$

Answer 1

Checking the no in proportion:

Ratio of $15,45=15:45=$$\frac{15÷15}{45÷15}=\frac{1}{3}$

Ratio of $5,25=5:25=$$\frac{5÷5}{25÷5}=\frac{1}{5}$

So, $15:45\ne 5:25$

Hence, the numbers are not in proportion.