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Finding the Fourth Proportional to 8,329.76, 12,488.48 and 3,942.08

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Solution

The fourth proportional to 8,329.76, 12,488.48 and 3,942.08 is: 5,910.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,329.76 : 12,488.48 = 3,942.08 : x
  2. Step 2: Convert to fraction form
    8,329.76/12,488.48 = 3,942.08/x
  3. Step 3: Cross multiply
    8,329.76x = 12,488.48 × 3,942.08
  4. Step 4: Simplify right side
    8,329.76x = 49,230,587.24
  5. Step 5: Solve for x
    x = 49,230,587.24/8,329.76
  6. Step 6: Final answer
    x = 5,910.20

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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.