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Finding the Third Proportional to 17,910 and 27,891

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Solution

The third proportional to 17,910 and 27,891 is: 43,434.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,910 : 27,891 = 27,891 : x
  2. Step 2: Convert to fraction form
    17,910/27,891 = 27,891/x
  3. Step 3: Cross multiply
    17,910x = 27,891 × 27,891
  4. Step 4: Simplify right side
    17,910x = 777,907,881
  5. Step 5: Solve for x
    x = 777,907,881/17,910
  6. Step 6: Final answer
    x = 43,434.28

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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.