Home / 21,874.80-32,781.46-12,500.78

Finding the Fourth Proportional to 21,874.80, 32,781.46 and 12,500.78

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Solution

The fourth proportional to 21,874.80, 32,781.46 and 12,500.78 is: 18,733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,874.80 : 32,781.46 = 12,500.78 : x
  2. Step 2: Convert to fraction form
    21,874.80/32,781.46 = 12,500.78/x
  3. Step 3: Cross multiply
    21,874.80x = 32,781.46 × 12,500.78
  4. Step 4: Simplify right side
    21,874.80x = 409,793,819.54
  5. Step 5: Solve for x
    x = 409,793,819.54/21,874.80
  6. Step 6: Final answer
    x = 18,733.60

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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.