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Finding the Third Proportional to 8,603 and 13,688

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Solution

The third proportional to 8,603 and 13,688 is: 21,778.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603 : 13,688 = 13,688 : x
  2. Step 2: Convert to fraction form
    8,603/13,688 = 13,688/x
  3. Step 3: Cross multiply
    8,603x = 13,688 × 13,688
  4. Step 4: Simplify right side
    8,603x = 187,361,344
  5. Step 5: Solve for x
    x = 187,361,344/8,603
  6. Step 6: Final answer
    x = 21,778.61

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.