Home / 20,984.34-31,481.96-9,294.78

Finding the Fourth Proportional to 20,984.34, 31,481.96 and 9,294.78

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Solution

The fourth proportional to 20,984.34, 31,481.96 and 9,294.78 is: 13,944.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.34 : 31,481.96 = 9,294.78 : x
  2. Step 2: Convert to fraction form
    20,984.34/31,481.96 = 9,294.78/x
  3. Step 3: Cross multiply
    20,984.34x = 31,481.96 × 9,294.78
  4. Step 4: Simplify right side
    20,984.34x = 292,617,845.69
  5. Step 5: Solve for x
    x = 292,617,845.69/20,984.34
  6. Step 6: Final answer
    x = 13,944.58

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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.