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Finding the Third Proportional to 8,615 and 13,329

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Solution

The third proportional to 8,615 and 13,329 is: 20,622.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615 : 13,329 = 13,329 : x
  2. Step 2: Convert to fraction form
    8,615/13,329 = 13,329/x
  3. Step 3: Cross multiply
    8,615x = 13,329 × 13,329
  4. Step 4: Simplify right side
    8,615x = 177,662,241
  5. Step 5: Solve for x
    x = 177,662,241/8,615
  6. Step 6: Final answer
    x = 20,622.43

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.