You can put this solution on YOUR website! I believe you have a typo, because I just answered a question that looks almost exactly like yours, but has the sort of nice round answer that you expect in a math class problem.
Question 711764 in Number-Line:
complete the number line:
19 1/3 27 __ ___ ___ 57 2/3
Without that after you wonder if it would be an arithmetic sequence or some other kind of sequence.
Assuming it is an arithmetic sequence with 3 missing numbers between and
the same common difference number is added to again and again to get the other numbers in the sequence.
It is added 4 times to get through the 3 missing numbers to so is 4 times that difference and the common difference is
In that case, the number after is
You can also calculate it as
The second missing number would be
You can also calculate it as
The third missing number would be
You can also calculate it as
