Home / 20,105.30-30,125.55-17,318.90

Finding the Fourth Proportional to 20,105.30, 30,125.55 and 17,318.90

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Solution

The fourth proportional to 20,105.30, 30,125.55 and 17,318.90 is: 25,950.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.30 : 30,125.55 = 17,318.90 : x
  2. Step 2: Convert to fraction form
    20,105.30/30,125.55 = 17,318.90/x
  3. Step 3: Cross multiply
    20,105.30x = 30,125.55 × 17,318.90
  4. Step 4: Simplify right side
    20,105.30x = 521,741,387.90
  5. Step 5: Solve for x
    x = 521,741,387.90/20,105.30
  6. Step 6: Final answer
    x = 25,950.44

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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.