Home / 20,704.92-31,057.08-5,122.56

Finding the Fourth Proportional to 20,704.92, 31,057.08 and 5,122.56

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Solution

The fourth proportional to 20,704.92, 31,057.08 and 5,122.56 is: 7,683.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.92 : 31,057.08 = 5,122.56 : x
  2. Step 2: Convert to fraction form
    20,704.92/31,057.08 = 5,122.56/x
  3. Step 3: Cross multiply
    20,704.92x = 31,057.08 × 5,122.56
  4. Step 4: Simplify right side
    20,704.92x = 159,091,755.72
  5. Step 5: Solve for x
    x = 159,091,755.72/20,704.92
  6. Step 6: Final answer
    x = 7,683.77

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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.