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Finding the Fourth Proportional to 8,679.92, 13,017.22 and 3,132.58

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Solution

The fourth proportional to 8,679.92, 13,017.22 and 3,132.58 is: 4,697.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.92 : 13,017.22 = 3,132.58 : x
  2. Step 2: Convert to fraction form
    8,679.92/13,017.22 = 3,132.58/x
  3. Step 3: Cross multiply
    8,679.92x = 13,017.22 × 3,132.58
  4. Step 4: Simplify right side
    8,679.92x = 40,777,483.03
  5. Step 5: Solve for x
    x = 40,777,483.03/8,679.92
  6. Step 6: Final answer
    x = 4,697.91

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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.