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Finding the Fourth Proportional to 11,221.30, 16,823.85 and 7,327.90

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Solution

The fourth proportional to 11,221.30, 16,823.85 and 7,327.90 is: 10,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,221.30 : 16,823.85 = 7,327.90 : x
  2. Step 2: Convert to fraction form
    11,221.30/16,823.85 = 7,327.90/x
  3. Step 3: Cross multiply
    11,221.30x = 16,823.85 × 7,327.90
  4. Step 4: Simplify right side
    11,221.30x = 123,283,490.42
  5. Step 5: Solve for x
    x = 123,283,490.42/11,221.30
  6. Step 6: Final answer
    x = 10,986.56

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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.