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Finding the Fourth Proportional to 8,778.76, 13,164.36 and 3,512.86

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Solution

The fourth proportional to 8,778.76, 13,164.36 and 3,512.86 is: 5,267.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.76 : 13,164.36 = 3,512.86 : x
  2. Step 2: Convert to fraction form
    8,778.76/13,164.36 = 3,512.86/x
  3. Step 3: Cross multiply
    8,778.76x = 13,164.36 × 3,512.86
  4. Step 4: Simplify right side
    8,778.76x = 46,244,553.67
  5. Step 5: Solve for x
    x = 46,244,553.67/8,778.76
  6. Step 6: Final answer
    x = 5,267.78

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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.