Home / 3,727.28-5,143.84-2,155.44

Finding the Fourth Proportional to 3,727.28, 5,143.84 and 2,155.44

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Solution

The fourth proportional to 3,727.28, 5,143.84 and 2,155.44 is: 2,974.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,727.28 : 5,143.84 = 2,155.44 : x
  2. Step 2: Convert to fraction form
    3,727.28/5,143.84 = 2,155.44/x
  3. Step 3: Cross multiply
    3,727.28x = 5,143.84 × 2,155.44
  4. Step 4: Simplify right side
    3,727.28x = 11,087,238.49
  5. Step 5: Solve for x
    x = 11,087,238.49/3,727.28
  6. Step 6: Final answer
    x = 2,974.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.