If the number is represented by X, then '4 more than a number' is represented by (X+4).
That would be every number greater than 0.25 and less than 0.6 . There are an infinite number of them.
2,410
12.8
1236
105
81.25
135
Four more than three times a number
4 + x > 13.
Number = 14
n + 4