Home / 20,545.38-30,818.27-7,217.78

Finding the Fourth Proportional to 20,545.38, 30,818.27 and 7,217.78

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Solution

The fourth proportional to 20,545.38, 30,818.27 and 7,217.78 is: 10,826.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,545.38 : 30,818.27 = 7,217.78 : x
  2. Step 2: Convert to fraction form
    20,545.38/30,818.27 = 7,217.78/x
  3. Step 3: Cross multiply
    20,545.38x = 30,818.27 × 7,217.78
  4. Step 4: Simplify right side
    20,545.38x = 222,439,356.79
  5. Step 5: Solve for x
    x = 222,439,356.79/20,545.38
  6. Step 6: Final answer
    x = 10,826.73

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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.