Home / 3,727.38-5,143.78-2,155.57

Finding the Fourth Proportional to 3,727.38, 5,143.78 and 2,155.57

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Solution

The fourth proportional to 3,727.38, 5,143.78 and 2,155.57 is: 2,974.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,727.38 : 5,143.78 = 2,155.57 : x
  2. Step 2: Convert to fraction form
    3,727.38/5,143.78 = 2,155.57/x
  3. Step 3: Cross multiply
    3,727.38x = 5,143.78 × 2,155.57
  4. Step 4: Simplify right side
    3,727.38x = 11,087,777.85
  5. Step 5: Solve for x
    x = 11,087,777.85/3,727.38
  6. Step 6: Final answer
    x = 2,974.68

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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.