Home / 20,879.46-31,311.89-9,791.37

Finding the Fourth Proportional to 20,879.46, 31,311.89 and 9,791.37

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Solution

The fourth proportional to 20,879.46, 31,311.89 and 9,791.37 is: 14,683.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.46 : 31,311.89 = 9,791.37 : x
  2. Step 2: Convert to fraction form
    20,879.46/31,311.89 = 9,791.37/x
  3. Step 3: Cross multiply
    20,879.46x = 31,311.89 × 9,791.37
  4. Step 4: Simplify right side
    20,879.46x = 306,586,251.43
  5. Step 5: Solve for x
    x = 306,586,251.43/20,879.46
  6. Step 6: Final answer
    x = 14,683.63

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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.