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Finding the Fourth Proportional to 8,918.82, 13,380.03 and 2,679.21

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Solution

The fourth proportional to 8,918.82, 13,380.03 and 2,679.21 is: 4,019.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.82 : 13,380.03 = 2,679.21 : x
  2. Step 2: Convert to fraction form
    8,918.82/13,380.03 = 2,679.21/x
  3. Step 3: Cross multiply
    8,918.82x = 13,380.03 × 2,679.21
  4. Step 4: Simplify right side
    8,918.82x = 35,847,910.18
  5. Step 5: Solve for x
    x = 35,847,910.18/8,918.82
  6. Step 6: Final answer
    x = 4,019.36

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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.