Home / 20,132.78-30,211.04-7,663.29

Finding the Fourth Proportional to 20,132.78, 30,211.04 and 7,663.29

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Solution

The fourth proportional to 20,132.78, 30,211.04 and 7,663.29 is: 11,499.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,132.78 : 30,211.04 = 7,663.29 : x
  2. Step 2: Convert to fraction form
    20,132.78/30,211.04 = 7,663.29/x
  3. Step 3: Cross multiply
    20,132.78x = 30,211.04 × 7,663.29
  4. Step 4: Simplify right side
    20,132.78x = 231,515,922.41
  5. Step 5: Solve for x
    x = 231,515,922.41/20,132.78
  6. Step 6: Final answer
    x = 11,499.45

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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.