Home / 20,140.43-30,179.60-10,781.69

Finding the Fourth Proportional to 20,140.43, 30,179.60 and 10,781.69

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Solution

The fourth proportional to 20,140.43, 30,179.60 and 10,781.69 is: 16,155.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.43 : 30,179.60 = 10,781.69 : x
  2. Step 2: Convert to fraction form
    20,140.43/30,179.60 = 10,781.69/x
  3. Step 3: Cross multiply
    20,140.43x = 30,179.60 × 10,781.69
  4. Step 4: Simplify right side
    20,140.43x = 325,387,037.62
  5. Step 5: Solve for x
    x = 325,387,037.62/20,140.43
  6. Step 6: Final answer
    x = 16,155.91

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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.