Answer: 38,000
Explanation:
Given : A baseball stadium has 38,496 seats.
We can see that in the given number 8,486 is near to 8000 rather than 9000 [∵ 8,486 lies in between 8000 and 9000 ]
Therefore, when we round 38,496 to the nearest thousand, we get

Therefore, when we round the given number of seats (38,496) ,we get total number of seats as 38,000.
hence, the required answer is 38,000.