Home / 20,817.74-31,229.90-8,974.88

Finding the Fourth Proportional to 20,817.74, 31,229.90 and 8,974.88

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Solution

The fourth proportional to 20,817.74, 31,229.90 and 8,974.88 is: 13,463.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.74 : 31,229.90 = 8,974.88 : x
  2. Step 2: Convert to fraction form
    20,817.74/31,229.90 = 8,974.88/x
  3. Step 3: Cross multiply
    20,817.74x = 31,229.90 × 8,974.88
  4. Step 4: Simplify right side
    20,817.74x = 280,284,705.08
  5. Step 5: Solve for x
    x = 280,284,705.08/20,817.74
  6. Step 6: Final answer
    x = 13,463.74

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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.