Home / 20,140.18-30,179.22-10,781.44

Finding the Fourth Proportional to 20,140.18, 30,179.22 and 10,781.44

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Solution

The fourth proportional to 20,140.18, 30,179.22 and 10,781.44 is: 16,155.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.18 : 30,179.22 = 10,781.44 : x
  2. Step 2: Convert to fraction form
    20,140.18/30,179.22 = 10,781.44/x
  3. Step 3: Cross multiply
    20,140.18x = 30,179.22 × 10,781.44
  4. Step 4: Simplify right side
    20,140.18x = 325,375,449.68
  5. Step 5: Solve for x
    x = 325,375,449.68/20,140.18
  6. Step 6: Final answer
    x = 16,155.54

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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.