Home / 20,107.20-27,743.73-12,147.90

Finding the Fourth Proportional to 20,107.20, 27,743.73 and 12,147.90

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Solution

The fourth proportional to 20,107.20, 27,743.73 and 12,147.90 is: 16,761.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.20 : 27,743.73 = 12,147.90 : x
  2. Step 2: Convert to fraction form
    20,107.20/27,743.73 = 12,147.90/x
  3. Step 3: Cross multiply
    20,107.20x = 27,743.73 × 12,147.90
  4. Step 4: Simplify right side
    20,107.20x = 337,028,057.67
  5. Step 5: Solve for x
    x = 337,028,057.67/20,107.20
  6. Step 6: Final answer
    x = 16,761.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.