Home / 20,170.10-30,255.15-19,781.30

Finding the Fourth Proportional to 20,170.10, 30,255.15 and 19,781.30

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Solution

The fourth proportional to 20,170.10, 30,255.15 and 19,781.30 is: 29,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,170.10 : 30,255.15 = 19,781.30 : x
  2. Step 2: Convert to fraction form
    20,170.10/30,255.15 = 19,781.30/x
  3. Step 3: Cross multiply
    20,170.10x = 30,255.15 × 19,781.30
  4. Step 4: Simplify right side
    20,170.10x = 598,486,198.70
  5. Step 5: Solve for x
    x = 598,486,198.70/20,170.10
  6. Step 6: Final answer
    x = 29,671.95

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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.