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Finding the Fourth Proportional to 8,520.91, 12,781.46 and 2,974.26

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Solution

The fourth proportional to 8,520.91, 12,781.46 and 2,974.26 is: 4,461.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.91 : 12,781.46 = 2,974.26 : x
  2. Step 2: Convert to fraction form
    8,520.91/12,781.46 = 2,974.26/x
  3. Step 3: Cross multiply
    8,520.91x = 12,781.46 × 2,974.26
  4. Step 4: Simplify right side
    8,520.91x = 38,015,385.22
  5. Step 5: Solve for x
    x = 38,015,385.22/8,520.91
  6. Step 6: Final answer
    x = 4,461.42

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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.