Home / 20,140.68-30,179.96-10,781.94

Finding the Fourth Proportional to 20,140.68, 30,179.96 and 10,781.94

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Solution

The fourth proportional to 20,140.68, 30,179.96 and 10,781.94 is: 16,156.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.68 : 30,179.96 = 10,781.94 : x
  2. Step 2: Convert to fraction form
    20,140.68/30,179.96 = 10,781.94/x
  3. Step 3: Cross multiply
    20,140.68x = 30,179.96 × 10,781.94
  4. Step 4: Simplify right side
    20,140.68x = 325,398,517.92
  5. Step 5: Solve for x
    x = 325,398,517.92/20,140.68
  6. Step 6: Final answer
    x = 16,156.28

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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.