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Finding the Fourth Proportional to 8,920.62, 13,380.39 and 2,764.62

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Solution

The fourth proportional to 8,920.62, 13,380.39 and 2,764.62 is: 4,146.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.62 : 13,380.39 = 2,764.62 : x
  2. Step 2: Convert to fraction form
    8,920.62/13,380.39 = 2,764.62/x
  3. Step 3: Cross multiply
    8,920.62x = 13,380.39 × 2,764.62
  4. Step 4: Simplify right side
    8,920.62x = 36,991,693.80
  5. Step 5: Solve for x
    x = 36,991,693.80/8,920.62
  6. Step 6: Final answer
    x = 4,146.76

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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.