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Finding the Third Proportional to 18,618 and 38,223

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Solution

The third proportional to 18,618 and 38,223 is: 78,472.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618 : 38,223 = 38,223 : x
  2. Step 2: Convert to fraction form
    18,618/38,223 = 38,223/x
  3. Step 3: Cross multiply
    18,618x = 38,223 × 38,223
  4. Step 4: Simplify right side
    18,618x = 1,460,997,729
  5. Step 5: Solve for x
    x = 1,460,997,729/18,618
  6. Step 6: Final answer
    x = 78,472.32

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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.