Home / 20,139.20-30,146.54-19,843.96

Finding the Fourth Proportional to 20,139.20, 30,146.54 and 19,843.96

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Solution

The fourth proportional to 20,139.20, 30,146.54 and 19,843.96 is: 29,704.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.20 : 30,146.54 = 19,843.96 : x
  2. Step 2: Convert to fraction form
    20,139.20/30,146.54 = 19,843.96/x
  3. Step 3: Cross multiply
    20,139.20x = 30,146.54 × 19,843.96
  4. Step 4: Simplify right side
    20,139.20x = 598,226,733.90
  5. Step 5: Solve for x
    x = 598,226,733.90/20,139.20
  6. Step 6: Final answer
    x = 29,704.59

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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.