Question

solve for d in the proportion
\frac{4}{d} = \frac{20}{40}

d = \square

submit

Explanation:

Step1: Cross - multiply the proportion

Given the proportion $\frac{4}{d}=\frac{20}{40}$, cross - multiplying gives us $20\times d = 4\times40$.

Step2: Simplify the right - hand side

Calculate $4\times40 = 160$, so the equation becomes $20d=160$.

Step3: Solve for $d$

Divide both sides of the equation $20d = 160$ by 20. That is $d=\frac{160}{20}$.

Step4: Calculate the value of $d$

$\frac{160}{20}=8$.

Answer:

8