Home / 31,427.76-47,174.44-13,909.90

Finding the Fourth Proportional to 31,427.76, 47,174.44 and 13,909.90

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Solution

The fourth proportional to 31,427.76, 47,174.44 and 13,909.90 is: 20,879.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,427.76 : 47,174.44 = 13,909.90 : x
  2. Step 2: Convert to fraction form
    31,427.76/47,174.44 = 13,909.90/x
  3. Step 3: Cross multiply
    31,427.76x = 47,174.44 × 13,909.90
  4. Step 4: Simplify right side
    31,427.76x = 656,191,742.96
  5. Step 5: Solve for x
    x = 656,191,742.96/31,427.76
  6. Step 6: Final answer
    x = 20,879.37

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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.