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Finding the Third Proportional to 18,609 and 38,205

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Solution

The third proportional to 18,609 and 38,205 is: 78,436.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,609 : 38,205 = 38,205 : x
  2. Step 2: Convert to fraction form
    18,609/38,205 = 38,205/x
  3. Step 3: Cross multiply
    18,609x = 38,205 × 38,205
  4. Step 4: Simplify right side
    18,609x = 1,459,622,025
  5. Step 5: Solve for x
    x = 1,459,622,025/18,609
  6. Step 6: Final answer
    x = 78,436.35

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.