Home / 8,319.87-12,472.51-3,129.39

Finding the Fourth Proportional to 8,319.87, 12,472.51 and 3,129.39

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Solution

The fourth proportional to 8,319.87, 12,472.51 and 3,129.39 is: 4,691.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.87 : 12,472.51 = 3,129.39 : x
  2. Step 2: Convert to fraction form
    8,319.87/12,472.51 = 3,129.39/x
  3. Step 3: Cross multiply
    8,319.87x = 12,472.51 × 3,129.39
  4. Step 4: Simplify right side
    8,319.87x = 39,031,270.06
  5. Step 5: Solve for x
    x = 39,031,270.06/8,319.87
  6. Step 6: Final answer
    x = 4,691.33

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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.