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Finding the Fourth Proportional to 8,591.62, 12,889.45 and 2,668.21

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Solution

The fourth proportional to 8,591.62, 12,889.45 and 2,668.21 is: 4,002.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,591.62 : 12,889.45 = 2,668.21 : x
  2. Step 2: Convert to fraction form
    8,591.62/12,889.45 = 2,668.21/x
  3. Step 3: Cross multiply
    8,591.62x = 12,889.45 × 2,668.21
  4. Step 4: Simplify right side
    8,591.62x = 34,391,721.12
  5. Step 5: Solve for x
    x = 34,391,721.12/8,591.62
  6. Step 6: Final answer
    x = 4,002.94

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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.