Home / 25,757.30-38,672.40-20,216.90

Finding the Fourth Proportional to 25,757.30, 38,672.40 and 20,216.90

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Solution

The fourth proportional to 25,757.30, 38,672.40 and 20,216.90 is: 30,353.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,757.30 : 38,672.40 = 20,216.90 : x
  2. Step 2: Convert to fraction form
    25,757.30/38,672.40 = 20,216.90/x
  3. Step 3: Cross multiply
    25,757.30x = 38,672.40 × 20,216.90
  4. Step 4: Simplify right side
    25,757.30x = 781,836,043.56
  5. Step 5: Solve for x
    x = 781,836,043.56/25,757.30
  6. Step 6: Final answer
    x = 30,353.96

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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.