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Finding the Fourth Proportional to 8,591.40, 12,888.54 and 2,747.88

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Solution

The fourth proportional to 8,591.40, 12,888.54 and 2,747.88 is: 4,122.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,591.40 : 12,888.54 = 2,747.88 : x
  2. Step 2: Convert to fraction form
    8,591.40/12,888.54 = 2,747.88/x
  3. Step 3: Cross multiply
    8,591.40x = 12,888.54 × 2,747.88
  4. Step 4: Simplify right side
    8,591.40x = 35,416,161.30
  5. Step 5: Solve for x
    x = 35,416,161.30/8,591.40
  6. Step 6: Final answer
    x = 4,122.28

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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.