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Finding the Fourth Proportional to 28,497.12, 42,747.12 and 8,789.16

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Solution

The fourth proportional to 28,497.12, 42,747.12 and 8,789.16 is: 13,184.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.12 : 42,747.12 = 8,789.16 : x
  2. Step 2: Convert to fraction form
    28,497.12/42,747.12 = 8,789.16/x
  3. Step 3: Cross multiply
    28,497.12x = 42,747.12 × 8,789.16
  4. Step 4: Simplify right side
    28,497.12x = 375,711,277.22
  5. Step 5: Solve for x
    x = 375,711,277.22/28,497.12
  6. Step 6: Final answer
    x = 13,184.18

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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.