Home / 20,776.29-31,144.38-8,938.54

Finding the Fourth Proportional to 20,776.29, 31,144.38 and 8,938.54

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Solution

The fourth proportional to 20,776.29, 31,144.38 and 8,938.54 is: 13,399.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.29 : 31,144.38 = 8,938.54 : x
  2. Step 2: Convert to fraction form
    20,776.29/31,144.38 = 8,938.54/x
  3. Step 3: Cross multiply
    20,776.29x = 31,144.38 × 8,938.54
  4. Step 4: Simplify right side
    20,776.29x = 278,385,286.41
  5. Step 5: Solve for x
    x = 278,385,286.41/20,776.29
  6. Step 6: Final answer
    x = 13,399.18

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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.