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Finding the Fourth Proportional to 8,505, 11,729.34 and 5,517.99

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Solution

The fourth proportional to 8,505, 11,729.34 and 5,517.99 is: 7,609.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505 : 11,729.34 = 5,517.99 : x
  2. Step 2: Convert to fraction form
    8,505/11,729.34 = 5,517.99/x
  3. Step 3: Cross multiply
    8,505x = 11,729.34 × 5,517.99
  4. Step 4: Simplify right side
    8,505x = 64,722,380.83
  5. Step 5: Solve for x
    x = 64,722,380.83/8,505
  6. Step 6: Final answer
    x = 7,609.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.