The amounts of rainfall measured in inches in downtown Los Angeles during the six rainy seasons from 2000 to 2006 are given as a dataset.

15.56, 4.16, 10.38, 8.61, 26.51, 10.89

Find the range of this dataset.

To find the range of a dataset, you need to subtract the smallest value from the largest value.

In this case, the smallest value is 4.16 and the largest value is 26.51.

Therefore, the range of the dataset is 26.51 - 4.16 = 22.35 inches. Answer: \boxed{22.35}.

To find the range of a dataset, you subtract the minimum value from the maximum value.

In this case, the minimum value is 4.16 inches and the maximum value is 26.51 inches.

Therefore, the range of this dataset is:

26.51 - 4.16 = 22.35 inches.