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Finding the Fourth Proportional to 28,357.07, 42,545.07 and 12,559.95

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Solution

The fourth proportional to 28,357.07, 42,545.07 and 12,559.95 is: 18,844.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.07 : 42,545.07 = 12,559.95 : x
  2. Step 2: Convert to fraction form
    28,357.07/42,545.07 = 12,559.95/x
  3. Step 3: Cross multiply
    28,357.07x = 42,545.07 × 12,559.95
  4. Step 4: Simplify right side
    28,357.07x = 534,363,951.95
  5. Step 5: Solve for x
    x = 534,363,951.95/28,357.07
  6. Step 6: Final answer
    x = 18,844.12

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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.