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Finding the Fourth Proportional to 8,330.40, 12,481.20 and 5,248.80

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Solution

The fourth proportional to 8,330.40, 12,481.20 and 5,248.80 is: 7,864.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,330.40 : 12,481.20 = 5,248.80 : x
  2. Step 2: Convert to fraction form
    8,330.40/12,481.20 = 5,248.80/x
  3. Step 3: Cross multiply
    8,330.40x = 12,481.20 × 5,248.80
  4. Step 4: Simplify right side
    8,330.40x = 65,511,322.56
  5. Step 5: Solve for x
    x = 65,511,322.56/8,330.40
  6. Step 6: Final answer
    x = 7,864.13

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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.