Home / 20,140.38-30,229.38-10,286.73

Finding the Fourth Proportional to 20,140.38, 30,229.38 and 10,286.73

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Solution

The fourth proportional to 20,140.38, 30,229.38 and 10,286.73 is: 15,439.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.38 : 30,229.38 = 10,286.73 : x
  2. Step 2: Convert to fraction form
    20,140.38/30,229.38 = 10,286.73/x
  3. Step 3: Cross multiply
    20,140.38x = 30,229.38 × 10,286.73
  4. Step 4: Simplify right side
    20,140.38x = 310,961,470.13
  5. Step 5: Solve for x
    x = 310,961,470.13/20,140.38
  6. Step 6: Final answer
    x = 15,439.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.