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Finding the Third Proportional to 17,878 and 19,894

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Solution

The third proportional to 17,878 and 19,894 is: 22,137.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,878 : 19,894 = 19,894 : x
  2. Step 2: Convert to fraction form
    17,878/19,894 = 19,894/x
  3. Step 3: Cross multiply
    17,878x = 19,894 × 19,894
  4. Step 4: Simplify right side
    17,878x = 395,771,236
  5. Step 5: Solve for x
    x = 395,771,236/17,878
  6. Step 6: Final answer
    x = 22,137.33

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.