Home / 12,545.91-18,821.43-3,780.90

Finding the Fourth Proportional to 12,545.91, 18,821.43 and 3,780.90

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Solution

The fourth proportional to 12,545.91, 18,821.43 and 3,780.90 is: 5,672.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,545.91 : 18,821.43 = 3,780.90 : x
  2. Step 2: Convert to fraction form
    12,545.91/18,821.43 = 3,780.90/x
  3. Step 3: Cross multiply
    12,545.91x = 18,821.43 × 3,780.90
  4. Step 4: Simplify right side
    12,545.91x = 71,161,944.69
  5. Step 5: Solve for x
    x = 71,161,944.69/12,545.91
  6. Step 6: Final answer
    x = 5,672.12

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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.