Complete the Sequence: Finding the Pattern in 1,000, 2,000, 3,000,...

To solve this problem, let's determine the pattern in the given sequence:

• Given Sequence: $1000, 2000, 3000, \ldots$
• Step 1: Calculate the common difference.
• The difference between 2000 and 1000 is $2000 - 1000 = 1000$.
• The difference between 3000 and 2000 is $3000 - 2000 = 1000$.
• Step 2: Use the common difference to find the subsequent terms.
• The next term after 3000 is $3000 + 1000 = 4000$.
• Following that, the next term is $4000 + 1000 = 5000$.
• And then $5000 + 1000 = 6000$.
• Step 3: Compare with answer choices.
• Choice 4: $4000, 5000, 6000$ matches the calculated sequence.

Therefore, the completed sequence is $4000, 5000, 6000$.