Home / 20,912.46-31,372.60-6,876.55

Finding the Fourth Proportional to 20,912.46, 31,372.60 and 6,876.55

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Solution

The fourth proportional to 20,912.46, 31,372.60 and 6,876.55 is: 10,316.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.46 : 31,372.60 = 6,876.55 : x
  2. Step 2: Convert to fraction form
    20,912.46/31,372.60 = 6,876.55/x
  3. Step 3: Cross multiply
    20,912.46x = 31,372.60 × 6,876.55
  4. Step 4: Simplify right side
    20,912.46x = 215,735,252.53
  5. Step 5: Solve for x
    x = 215,735,252.53/20,912.46
  6. Step 6: Final answer
    x = 10,316.11

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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.