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Finding the Fourth Proportional to 13,129.60, 19,713.60 and 9,251.20

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Solution

The fourth proportional to 13,129.60, 19,713.60 and 9,251.20 is: 13,890.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.60 : 19,713.60 = 9,251.20 : x
  2. Step 2: Convert to fraction form
    13,129.60/19,713.60 = 9,251.20/x
  3. Step 3: Cross multiply
    13,129.60x = 19,713.60 × 9,251.20
  4. Step 4: Simplify right side
    13,129.60x = 182,374,456.32
  5. Step 5: Solve for x
    x = 182,374,456.32/13,129.60
  6. Step 6: Final answer
    x = 13,890.33

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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.