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Finding the Third Proportional to 8,685 and 13,069

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Solution

The third proportional to 8,685 and 13,069 is: 19,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685 : 13,069 = 13,069 : x
  2. Step 2: Convert to fraction form
    8,685/13,069 = 13,069/x
  3. Step 3: Cross multiply
    8,685x = 13,069 × 13,069
  4. Step 4: Simplify right side
    8,685x = 170,798,761
  5. Step 5: Solve for x
    x = 170,798,761/8,685
  6. Step 6: Final answer
    x = 19,665.95

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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.