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Finding the Third Proportional to 8,920 and 13,916

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Solution

The third proportional to 8,920 and 13,916 is: 21,710.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920 : 13,916 = 13,916 : x
  2. Step 2: Convert to fraction form
    8,920/13,916 = 13,916/x
  3. Step 3: Cross multiply
    8,920x = 13,916 × 13,916
  4. Step 4: Simplify right side
    8,920x = 193,655,056
  5. Step 5: Solve for x
    x = 193,655,056/8,920
  6. Step 6: Final answer
    x = 21,710.21

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.