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Finding the Third Proportional to 7,871 and 17,121

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Solution

The third proportional to 7,871 and 17,121 is: 37,241.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871 : 17,121 = 17,121 : x
  2. Step 2: Convert to fraction form
    7,871/17,121 = 17,121/x
  3. Step 3: Cross multiply
    7,871x = 17,121 × 17,121
  4. Step 4: Simplify right side
    7,871x = 293,128,641
  5. Step 5: Solve for x
    x = 293,128,641/7,871
  6. Step 6: Final answer
    x = 37,241.60

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.