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Finding the Third Proportional to 8,629 and 18,890

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Solution

The third proportional to 8,629 and 18,890 is: 41,352.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,629 : 18,890 = 18,890 : x
  2. Step 2: Convert to fraction form
    8,629/18,890 = 18,890/x
  3. Step 3: Cross multiply
    8,629x = 18,890 × 18,890
  4. Step 4: Simplify right side
    8,629x = 356,832,100
  5. Step 5: Solve for x
    x = 356,832,100/8,629
  6. Step 6: Final answer
    x = 41,352.66

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.