To find the number that will make the fractions equivalent, we can set the fractions equal to one another:
\[ \frac{7}{12} = \frac{?}{48} \]
Now, let's denote the unknown number as \( x \). Thus, we have:
\[ \frac{7}{12} = \frac{x}{48} \]
To solve for \( x \), we can cross-multiply:
\[ 7 \cdot 48 = 12 \cdot x \]
Calculating \( 7 \cdot 48 \):
\[ 7 \cdot 48 = 336 \]
Now we have:
\[ 336 = 12x \]
To isolate \( x \), divide both sides by 12:
\[ x = \frac{336}{12} \]
Calculating \( \frac{336}{12} \):
\[ x = 28 \]
So, the number that will make the fractions equivalent is:
\[ 28 \]