Answer
The number is 5,
Work Step by Step
Let x = the unknown number
Then
$3x$ = three times a number
$3x+4$=four more than three times a number
Thus, the translation of the given sentence as an equation is:
$3x+4=19$
Solving the equation gives:
$3x=19-4
\\3x = 15
\\x = \frac{15}{3}
\\x=5$
