Question

learn with an example or watch a video
complete the ratio table.
7 \t4
14 \t8
21 \t
28 \t16
35 \t20
submit

Explanation:

Step1: Find the ratio factor

The ratio of first column to second column is $\frac{7}{4} = 1.75$, so the second column value is $\frac{\text{first column value}}{1.75}$.

Step2: Calculate missing value

Substitute 21 into the formula: $\frac{21}{1.75} = 12$.
Alternatively, observe the pattern: first column values increase by 7 each time, second column values increase by 4 each time. $8 + 4 = 12$.

Answer:

12