Home / 20,761.36-31,144.04-7,610.56

Finding the Fourth Proportional to 20,761.36, 31,144.04 and 7,610.56

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Solution

The fourth proportional to 20,761.36, 31,144.04 and 7,610.56 is: 11,416.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.36 : 31,144.04 = 7,610.56 : x
  2. Step 2: Convert to fraction form
    20,761.36/31,144.04 = 7,610.56/x
  3. Step 3: Cross multiply
    20,761.36x = 31,144.04 × 7,610.56
  4. Step 4: Simplify right side
    20,761.36x = 237,023,585.06
  5. Step 5: Solve for x
    x = 237,023,585.06/20,761.36
  6. Step 6: Final answer
    x = 11,416.57

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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.