To find the missing numerator in the expression \( \frac{13}{24} + \frac{?}{24} = \frac{19}{24} \), you can set up the equation as follows:
\[ \frac{13 + ?}{24} = \frac{19}{24} \]
Now, since both fractions have the same denominator, you can equate the numerators:
\[ 13 + ? = 19 \]
To find the missing numerator, subtract 13 from both sides:
\[ ? = 19 - 13 \] \[ ? = 6 \]
Therefore, the missing numerator is 6.