Question

Is the ratio 4.2:1.5 proportional to the ratio 12:5? Explain.

Answer 1

Answer:

No.

Step-by-step explanation:

We can set this proportion up as:

$\frac{4.2}{1.5}=\frac{12}{5}$

For this to be true, cross-products need to be equal:

$4.2(5)=12(1.5)$,

However, we can see that this is not the case:

$4.2\cdot 5 \neq 12 \cdot 1.5$

Therefore, these ratios are not proportional.