We can set up a proportion using the given ratio:
Weight on Earth : Weight on Planet X = 5 : 12
Let's let x be the weight of the elephant on Planet X. We can substitute the given weight on Earth to solve for x:
3800 : x = 5 : 12
We can cross-multiply to get:
3800 * 12 = 5 * x
Simplifying the right side, we get:
45600 = x * 5
Dividing both sides by 5, we get:
x = 9120
Therefore, the weight of the elephant on Planet X is 9120 pounds.