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Finding the Fourth Proportional to 8,110.80, 12,169.80 and 3,949.20

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Solution

The fourth proportional to 8,110.80, 12,169.80 and 3,949.20 is: 5,925.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,110.80 : 12,169.80 = 3,949.20 : x
  2. Step 2: Convert to fraction form
    8,110.80/12,169.80 = 3,949.20/x
  3. Step 3: Cross multiply
    8,110.80x = 12,169.80 × 3,949.20
  4. Step 4: Simplify right side
    8,110.80x = 48,060,974.16
  5. Step 5: Solve for x
    x = 48,060,974.16/8,110.80
  6. Step 6: Final answer
    x = 5,925.55

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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.