Home / 20,631.82-30,928.76-7,481.02

Finding the Fourth Proportional to 20,631.82, 30,928.76 and 7,481.02

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Solution

The fourth proportional to 20,631.82, 30,928.76 and 7,481.02 is: 11,214.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.82 : 30,928.76 = 7,481.02 : x
  2. Step 2: Convert to fraction form
    20,631.82/30,928.76 = 7,481.02/x
  3. Step 3: Cross multiply
    20,631.82x = 30,928.76 × 7,481.02
  4. Step 4: Simplify right side
    20,631.82x = 231,378,672.14
  5. Step 5: Solve for x
    x = 231,378,672.14/20,631.82
  6. Step 6: Final answer
    x = 11,214.65

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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.