The answer is true.
We can verify this equation by cross multiplying, and check if the equation holds. The proportion is the same as
[tex]\displaystyle \frac{5 \ kg}{7.5\ kg}=\frac{10 \ kg}{15 \ kg}[/tex]
Cross multiply
[tex]5 \ kg \times 15 \ kg\stackrel{?}{=}7.5 \ kg \times 10 \ kg[/tex]
[tex]75 \ kg^2\stackrel{\checkmark}{=}75 \ kg^2[/tex]
Both sides are exactly the same, so, the proportion is true.
