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Finding the Fourth Proportional to 28,601.15, 42,890.31 and 8,874.41

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Solution

The fourth proportional to 28,601.15, 42,890.31 and 8,874.41 is: 13,308.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,601.15 : 42,890.31 = 8,874.41 : x
  2. Step 2: Convert to fraction form
    28,601.15/42,890.31 = 8,874.41/x
  3. Step 3: Cross multiply
    28,601.15x = 42,890.31 × 8,874.41
  4. Step 4: Simplify right side
    28,601.15x = 380,625,981.52
  5. Step 5: Solve for x
    x = 380,625,981.52/28,601.15
  6. Step 6: Final answer
    x = 13,308.07

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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.