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Finding the Third Proportional to 21,603 and 43,806

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Solution

The third proportional to 21,603 and 43,806 is: 88,828.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603 : 43,806 = 43,806 : x
  2. Step 2: Convert to fraction form
    21,603/43,806 = 43,806/x
  3. Step 3: Cross multiply
    21,603x = 43,806 × 43,806
  4. Step 4: Simplify right side
    21,603x = 1,918,965,636
  5. Step 5: Solve for x
    x = 1,918,965,636/21,603
  6. Step 6: Final answer
    x = 88,828.66

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.