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Finding the Third Proportional to 18,679 and 40,469

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Solution

The third proportional to 18,679 and 40,469 is: 87,678.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679 : 40,469 = 40,469 : x
  2. Step 2: Convert to fraction form
    18,679/40,469 = 40,469/x
  3. Step 3: Cross multiply
    18,679x = 40,469 × 40,469
  4. Step 4: Simplify right side
    18,679x = 1,637,739,961
  5. Step 5: Solve for x
    x = 1,637,739,961/18,679
  6. Step 6: Final answer
    x = 87,678.14

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.