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Finding the Fourth Proportional to 8,669.52, 12,996.52 and 3,121.56

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Solution

The fourth proportional to 8,669.52, 12,996.52 and 3,121.56 is: 4,679.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669.52 : 12,996.52 = 3,121.56 : x
  2. Step 2: Convert to fraction form
    8,669.52/12,996.52 = 3,121.56/x
  3. Step 3: Cross multiply
    8,669.52x = 12,996.52 × 3,121.56
  4. Step 4: Simplify right side
    8,669.52x = 40,569,416.97
  5. Step 5: Solve for x
    x = 40,569,416.97/8,669.52
  6. Step 6: Final answer
    x = 4,679.55

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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.