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Finding the Fourth Proportional to 28,357.43, 42,493.03 and 13,545.95

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Solution

The fourth proportional to 28,357.43, 42,493.03 and 13,545.95 is: 20,298.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.43 : 42,493.03 = 13,545.95 : x
  2. Step 2: Convert to fraction form
    28,357.43/42,493.03 = 13,545.95/x
  3. Step 3: Cross multiply
    28,357.43x = 42,493.03 × 13,545.95
  4. Step 4: Simplify right side
    28,357.43x = 575,608,459.73
  5. Step 5: Solve for x
    x = 575,608,459.73/28,357.43
  6. Step 6: Final answer
    x = 20,298.33

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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.