Home / 20,672.28-31,000.32-8,977.50

Finding the Fourth Proportional to 20,672.28, 31,000.32 and 8,977.50

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Solution

The fourth proportional to 20,672.28, 31,000.32 and 8,977.50 is: 13,462.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.28 : 31,000.32 = 8,977.50 : x
  2. Step 2: Convert to fraction form
    20,672.28/31,000.32 = 8,977.50/x
  3. Step 3: Cross multiply
    20,672.28x = 31,000.32 × 8,977.50
  4. Step 4: Simplify right side
    20,672.28x = 278,305,372.80
  5. Step 5: Solve for x
    x = 278,305,372.80/20,672.28
  6. Step 6: Final answer
    x = 13,462.73

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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.