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Finding the Fourth Proportional to 8,239.60, 12,348.60 and 7,310.80

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Solution

The fourth proportional to 8,239.60, 12,348.60 and 7,310.80 is: 10,956.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,239.60 : 12,348.60 = 7,310.80 : x
  2. Step 2: Convert to fraction form
    8,239.60/12,348.60 = 7,310.80/x
  3. Step 3: Cross multiply
    8,239.60x = 12,348.60 × 7,310.80
  4. Step 4: Simplify right side
    8,239.60x = 90,278,144.88
  5. Step 5: Solve for x
    x = 90,278,144.88/8,239.60
  6. Step 6: Final answer
    x = 10,956.62

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1.5x scale

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.