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Finding the Third Proportional to 18,867 and 21,054

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Solution

The third proportional to 18,867 and 21,054 is: 23,494.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867 : 21,054 = 21,054 : x
  2. Step 2: Convert to fraction form
    18,867/21,054 = 21,054/x
  3. Step 3: Cross multiply
    18,867x = 21,054 × 21,054
  4. Step 4: Simplify right side
    18,867x = 443,270,916
  5. Step 5: Solve for x
    x = 443,270,916/18,867
  6. Step 6: Final answer
    x = 23,494.51

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.