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Finding the Fourth Proportional to 13,100.80, 18,060 and 9,951.52

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Solution

The fourth proportional to 13,100.80, 18,060 and 9,951.52 is: 13,718.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,100.80 : 18,060 = 9,951.52 : x
  2. Step 2: Convert to fraction form
    13,100.80/18,060 = 9,951.52/x
  3. Step 3: Cross multiply
    13,100.80x = 18,060 × 9,951.52
  4. Step 4: Simplify right side
    13,100.80x = 179,724,451.20
  5. Step 5: Solve for x
    x = 179,724,451.20/13,100.80
  6. Step 6: Final answer
    x = 13,718.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.