Home / 20,761.20-31,044.60-15,512.40

Finding the Fourth Proportional to 20,761.20, 31,044.60 and 15,512.40

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Solution

The fourth proportional to 20,761.20, 31,044.60 and 15,512.40 is: 23,195.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.20 : 31,044.60 = 15,512.40 : x
  2. Step 2: Convert to fraction form
    20,761.20/31,044.60 = 15,512.40/x
  3. Step 3: Cross multiply
    20,761.20x = 31,044.60 × 15,512.40
  4. Step 4: Simplify right side
    20,761.20x = 481,576,253.04
  5. Step 5: Solve for x
    x = 481,576,253.04/20,761.20
  6. Step 6: Final answer
    x = 23,195.97

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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.