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Finding the Fourth Proportional to 8,478.60, 12,717.84 and 2,635.20

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Solution

The fourth proportional to 8,478.60, 12,717.84 and 2,635.20 is: 3,952.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.60 : 12,717.84 = 2,635.20 : x
  2. Step 2: Convert to fraction form
    8,478.60/12,717.84 = 2,635.20/x
  3. Step 3: Cross multiply
    8,478.60x = 12,717.84 × 2,635.20
  4. Step 4: Simplify right side
    8,478.60x = 33,514,051.97
  5. Step 5: Solve for x
    x = 33,514,051.97/8,478.60
  6. Step 6: Final answer
    x = 3,952.78

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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.