Question

If $a:b=c:d$, then according to theorem of equal ratios $a:b$ is also equal to _____.

• A. $a+b:c$
• B. $a+c:d$
• C. $a+d:c$
• D. $a+c:b+d$

Answer 1

The correct option is D $a+c:b+d$

According to the theorem of equivalent ratios,

$\frac{a}{b}=\frac{c}{d}=\frac{a+c}{b+d}$