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Finding the Third Proportional to 11,922 and 18,411

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Solution

The third proportional to 11,922 and 18,411 is: 28,431.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,922 : 18,411 = 18,411 : x
  2. Step 2: Convert to fraction form
    11,922/18,411 = 18,411/x
  3. Step 3: Cross multiply
    11,922x = 18,411 × 18,411
  4. Step 4: Simplify right side
    11,922x = 338,964,921
  5. Step 5: Solve for x
    x = 338,964,921/11,922
  6. Step 6: Final answer
    x = 28,431.88

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.