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Finding the Third Proportional to 21,047 and 45,374

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Solution

The third proportional to 21,047 and 45,374 is: 97,819.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,047 : 45,374 = 45,374 : x
  2. Step 2: Convert to fraction form
    21,047/45,374 = 45,374/x
  3. Step 3: Cross multiply
    21,047x = 45,374 × 45,374
  4. Step 4: Simplify right side
    21,047x = 2,058,799,876
  5. Step 5: Solve for x
    x = 2,058,799,876/21,047
  6. Step 6: Final answer
    x = 97,819.16

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.