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Finding the Fourth Proportional to 28,600.80, 42,909.30 and 8,881.35

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Solution

The fourth proportional to 28,600.80, 42,909.30 and 8,881.35 is: 13,324.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,600.80 : 42,909.30 = 8,881.35 : x
  2. Step 2: Convert to fraction form
    28,600.80/42,909.30 = 8,881.35/x
  3. Step 3: Cross multiply
    28,600.80x = 42,909.30 × 8,881.35
  4. Step 4: Simplify right side
    28,600.80x = 381,092,511.56
  5. Step 5: Solve for x
    x = 381,092,511.56/28,600.80
  6. Step 6: Final answer
    x = 13,324.54

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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.