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Finding the Fourth Proportional to 8,679.62, 12,971.80 and 6,344.54

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Solution

The fourth proportional to 8,679.62, 12,971.80 and 6,344.54 is: 9,481.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.62 : 12,971.80 = 6,344.54 : x
  2. Step 2: Convert to fraction form
    8,679.62/12,971.80 = 6,344.54/x
  3. Step 3: Cross multiply
    8,679.62x = 12,971.80 × 6,344.54
  4. Step 4: Simplify right side
    8,679.62x = 82,300,103.97
  5. Step 5: Solve for x
    x = 82,300,103.97/8,679.62
  6. Step 6: Final answer
    x = 9,481.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.