Metric Conversions Ladder Method poster illustrating how to convert between metric units using the ladder technique.

To solve the problem using the "Ladder Method" shown in the image:

1. Identify the starting point: We are starting with kilometers (km). On the ladder, "KILO" is at the top left.
2. Identify the ending point: We want to convert to meters (m). The "Basic Unit" for length is meters. This is in the middle of the ladder.
3. Count the steps: Move from KILO to the Basic Unit (meters).
* Step 1: KILO → HECTO
* Step 2: HECTO → DEKA
* Step 3: DEKA → Basic Unit
* Total steps = 3 steps to the right.
4. Apply the rule: The image says, "To convert to a smaller unit, move decimal point to the right or multiply." Since we are moving right on the ladder, we move the decimal point 3 places to the right.
5. Calculate:
* Start with 4 km. Think of it as 4.0
* Move decimal 1 place: 40.
* Move decimal 2 places: 400.
* Move decimal 3 places: 4000.

So, 4 km equals 4000 meters.

Final Answer:
4000