The geometric mean of n numbers is given by: ‌ Geometric Mean ‌=‌n√x1x2⋯xn. For the numbers 12,30, and 75, the geometric mean is: ‌ Geometric Mean ‌=‌3√12×30×75=‌3√27000=30. Quick Tip To find the geometric mean, multiply the numbers together and take the n-th root, where n is the number of numbers.