Home / 20,951.88-31,419.92-6,909.32

Finding the Fourth Proportional to 20,951.88, 31,419.92 and 6,909.32

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Solution

The fourth proportional to 20,951.88, 31,419.92 and 6,909.32 is: 10,361.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.88 : 31,419.92 = 6,909.32 : x
  2. Step 2: Convert to fraction form
    20,951.88/31,419.92 = 6,909.32/x
  3. Step 3: Cross multiply
    20,951.88x = 31,419.92 × 6,909.32
  4. Step 4: Simplify right side
    20,951.88x = 217,090,090.01
  5. Step 5: Solve for x
    x = 217,090,090.01/20,951.88
  6. Step 6: Final answer
    x = 10,361.37

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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.