The arithmetic sequence is 9, 16, 23,.......

Now we can find the common difference d by subtracting two consecutive terms.

d = 7

Now add 7 to the third term of the sequence , and then continue adding 7 until the next four terms are found.

.

The next four terms of the sequence are 30, 37, 44, 51.

The next four terms of the sequence are 30, 37, 44, 51.