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Finding the Third Proportional to 17,778 and 27,888

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Solution

The third proportional to 17,778 and 27,888 is: 43,747.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,778 : 27,888 = 27,888 : x
  2. Step 2: Convert to fraction form
    17,778/27,888 = 27,888/x
  3. Step 3: Cross multiply
    17,778x = 27,888 × 27,888
  4. Step 4: Simplify right side
    17,778x = 777,740,544
  5. Step 5: Solve for x
    x = 777,740,544/17,778
  6. Step 6: Final answer
    x = 43,747.36

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.