Home / 20,881.44-31,321.68-5,086.53

Finding the Fourth Proportional to 20,881.44, 31,321.68 and 5,086.53

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Solution

The fourth proportional to 20,881.44, 31,321.68 and 5,086.53 is: 7,629.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.44 : 31,321.68 = 5,086.53 : x
  2. Step 2: Convert to fraction form
    20,881.44/31,321.68 = 5,086.53/x
  3. Step 3: Cross multiply
    20,881.44x = 31,321.68 × 5,086.53
  4. Step 4: Simplify right side
    20,881.44x = 159,318,664.97
  5. Step 5: Solve for x
    x = 159,318,664.97/20,881.44
  6. Step 6: Final answer
    x = 7,629.68

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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.