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Finding the Third Proportional to 11,388 and 18,906

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Solution

The third proportional to 11,388 and 18,906 is: 31,387.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,388 : 18,906 = 18,906 : x
  2. Step 2: Convert to fraction form
    11,388/18,906 = 18,906/x
  3. Step 3: Cross multiply
    11,388x = 18,906 × 18,906
  4. Step 4: Simplify right side
    11,388x = 357,436,836
  5. Step 5: Solve for x
    x = 357,436,836/11,388
  6. Step 6: Final answer
    x = 31,387.15

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.