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Finding the Fourth Proportional to 8,791.20, 12,132 and 5,254.80

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Solution

The fourth proportional to 8,791.20, 12,132 and 5,254.80 is: 7,251.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.20 : 12,132 = 5,254.80 : x
  2. Step 2: Convert to fraction form
    8,791.20/12,132 = 5,254.80/x
  3. Step 3: Cross multiply
    8,791.20x = 12,132 × 5,254.80
  4. Step 4: Simplify right side
    8,791.20x = 63,751,233.60
  5. Step 5: Solve for x
    x = 63,751,233.60/8,791.20
  6. Step 6: Final answer
    x = 7,251.71

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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.