Home / 20,788.92-31,127.49-15,834.96

Finding the Fourth Proportional to 20,788.92, 31,127.49 and 15,834.96

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Solution

The fourth proportional to 20,788.92, 31,127.49 and 15,834.96 is: 23,709.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.92 : 31,127.49 = 15,834.96 : x
  2. Step 2: Convert to fraction form
    20,788.92/31,127.49 = 15,834.96/x
  3. Step 3: Cross multiply
    20,788.92x = 31,127.49 × 15,834.96
  4. Step 4: Simplify right side
    20,788.92x = 492,902,559.05
  5. Step 5: Solve for x
    x = 492,902,559.05/20,788.92
  6. Step 6: Final answer
    x = 23,709.87

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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.