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Finding the Third Proportional to 18,561 and 38,415

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Solution

The third proportional to 18,561 and 38,415 is: 79,506.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561 : 38,415 = 38,415 : x
  2. Step 2: Convert to fraction form
    18,561/38,415 = 38,415/x
  3. Step 3: Cross multiply
    18,561x = 38,415 × 38,415
  4. Step 4: Simplify right side
    18,561x = 1,475,712,225
  5. Step 5: Solve for x
    x = 1,475,712,225/18,561
  6. Step 6: Final answer
    x = 79,506.07

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.