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Finding the Fourth Proportional to 28,874.61, 43,311.66 and 9,152.66

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Solution

The fourth proportional to 28,874.61, 43,311.66 and 9,152.66 is: 13,728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,874.61 : 43,311.66 = 9,152.66 : x
  2. Step 2: Convert to fraction form
    28,874.61/43,311.66 = 9,152.66/x
  3. Step 3: Cross multiply
    28,874.61x = 43,311.66 × 9,152.66
  4. Step 4: Simplify right side
    28,874.61x = 396,416,681.46
  5. Step 5: Solve for x
    x = 396,416,681.46/28,874.61
  6. Step 6: Final answer
    x = 13,728.90

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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.