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Finding the Fourth Proportional to 13,712.78, 20,601.96 and 8,792

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Solution

The fourth proportional to 13,712.78, 20,601.96 and 8,792 is: 13,209.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,712.78 : 20,601.96 = 8,792 : x
  2. Step 2: Convert to fraction form
    13,712.78/20,601.96 = 8,792/x
  3. Step 3: Cross multiply
    13,712.78x = 20,601.96 × 8,792
  4. Step 4: Simplify right side
    13,712.78x = 181,132,432.32
  5. Step 5: Solve for x
    x = 181,132,432.32/13,712.78
  6. Step 6: Final answer
    x = 13,209.02

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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.