Question

Are the following ratios proportional of 5:15 and 10:30
yes or no
write the solution?​

Answer 1

5 : 15 10 : 30

$\frac{5}{15} \: \: \: \: \: \: \: \: \: \: \: \frac{10}{30}$

By cross multiply,

$5 \times 30 = 150$

$15 \times 10 = 150$

since, 5 × 30 = 15 × 10

hence, 5 : 15 and 10 : 30 are Proportional.