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Finding the Fourth Proportional to 8,468.60, 12,717.30 and 6,279.80

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Solution

The fourth proportional to 8,468.60, 12,717.30 and 6,279.80 is: 9,430.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,468.60 : 12,717.30 = 6,279.80 : x
  2. Step 2: Convert to fraction form
    8,468.60/12,717.30 = 6,279.80/x
  3. Step 3: Cross multiply
    8,468.60x = 12,717.30 × 6,279.80
  4. Step 4: Simplify right side
    8,468.60x = 79,862,100.54
  5. Step 5: Solve for x
    x = 79,862,100.54/8,468.60
  6. Step 6: Final answer
    x = 9,430.38

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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.