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Finding the Third Proportional to 8,680 and 13,809

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Solution

The third proportional to 8,680 and 13,809 is: 21,968.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680 : 13,809 = 13,809 : x
  2. Step 2: Convert to fraction form
    8,680/13,809 = 13,809/x
  3. Step 3: Cross multiply
    8,680x = 13,809 × 13,809
  4. Step 4: Simplify right side
    8,680x = 190,688,481
  5. Step 5: Solve for x
    x = 190,688,481/8,680
  6. Step 6: Final answer
    x = 21,968.72

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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.