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Finding the Fourth Proportional to 28,369.87, 42,561.12 and 8,649.97

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Solution

The fourth proportional to 28,369.87, 42,561.12 and 8,649.97 is: 12,976.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369.87 : 42,561.12 = 8,649.97 : x
  2. Step 2: Convert to fraction form
    28,369.87/42,561.12 = 8,649.97/x
  3. Step 3: Cross multiply
    28,369.87x = 42,561.12 × 8,649.97
  4. Step 4: Simplify right side
    28,369.87x = 368,152,411.17
  5. Step 5: Solve for x
    x = 368,152,411.17/28,369.87
  6. Step 6: Final answer
    x = 12,976.88

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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.