Home / 20,906.64-31,361.76-5,324.28

Finding the Fourth Proportional to 20,906.64, 31,361.76 and 5,324.28

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Solution

The fourth proportional to 20,906.64, 31,361.76 and 5,324.28 is: 7,986.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.64 : 31,361.76 = 5,324.28 : x
  2. Step 2: Convert to fraction form
    20,906.64/31,361.76 = 5,324.28/x
  3. Step 3: Cross multiply
    20,906.64x = 31,361.76 × 5,324.28
  4. Step 4: Simplify right side
    20,906.64x = 166,978,791.53
  5. Step 5: Solve for x
    x = 166,978,791.53/20,906.64
  6. Step 6: Final answer
    x = 7,986.88

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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.