Home / 20,120.70-30,213.45-13,575.90

Finding the Fourth Proportional to 20,120.70, 30,213.45 and 13,575.90

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Solution

The fourth proportional to 20,120.70, 30,213.45 and 13,575.90 is: 20,385.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.70 : 30,213.45 = 13,575.90 : x
  2. Step 2: Convert to fraction form
    20,120.70/30,213.45 = 13,575.90/x
  3. Step 3: Cross multiply
    20,120.70x = 30,213.45 × 13,575.90
  4. Step 4: Simplify right side
    20,120.70x = 410,174,775.86
  5. Step 5: Solve for x
    x = 410,174,775.86/20,120.70
  6. Step 6: Final answer
    x = 20,385.71

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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.