Home / 20,729.53-31,093.71-5,147.11

Finding the Fourth Proportional to 20,729.53, 31,093.71 and 5,147.11

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Solution

The fourth proportional to 20,729.53, 31,093.71 and 5,147.11 is: 7,720.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.53 : 31,093.71 = 5,147.11 : x
  2. Step 2: Convert to fraction form
    20,729.53/31,093.71 = 5,147.11/x
  3. Step 3: Cross multiply
    20,729.53x = 31,093.71 × 5,147.11
  4. Step 4: Simplify right side
    20,729.53x = 160,042,745.68
  5. Step 5: Solve for x
    x = 160,042,745.68/20,729.53
  6. Step 6: Final answer
    x = 7,720.52

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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.