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Finding the Fourth Proportional to 8,778.96, 12,113.82 and 5,002.20

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Solution

The fourth proportional to 8,778.96, 12,113.82 and 5,002.20 is: 6,902.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.96 : 12,113.82 = 5,002.20 : x
  2. Step 2: Convert to fraction form
    8,778.96/12,113.82 = 5,002.20/x
  3. Step 3: Cross multiply
    8,778.96x = 12,113.82 × 5,002.20
  4. Step 4: Simplify right side
    8,778.96x = 60,595,750.40
  5. Step 5: Solve for x
    x = 60,595,750.40/8,778.96
  6. Step 6: Final answer
    x = 6,902.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.