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Finding the Fourth Proportional to 8,759.72, 13,135.20 and 2,914.28

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Solution

The fourth proportional to 8,759.72, 13,135.20 and 2,914.28 is: 4,369.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.72 : 13,135.20 = 2,914.28 : x
  2. Step 2: Convert to fraction form
    8,759.72/13,135.20 = 2,914.28/x
  3. Step 3: Cross multiply
    8,759.72x = 13,135.20 × 2,914.28
  4. Step 4: Simplify right side
    8,759.72x = 38,279,650.66
  5. Step 5: Solve for x
    x = 38,279,650.66/8,759.72
  6. Step 6: Final answer
    x = 4,369.96

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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.