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Finding the Third Proportional to 8,916 and 13,819

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Solution

The third proportional to 8,916 and 13,819 is: 21,418.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916 : 13,819 = 13,819 : x
  2. Step 2: Convert to fraction form
    8,916/13,819 = 13,819/x
  3. Step 3: Cross multiply
    8,916x = 13,819 × 13,819
  4. Step 4: Simplify right side
    8,916x = 190,964,761
  5. Step 5: Solve for x
    x = 190,964,761/8,916
  6. Step 6: Final answer
    x = 21,418.21

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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.