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Finding the Third Proportional to 8,402 and 18,412

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Solution

The third proportional to 8,402 and 18,412 is: 40,347.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,402 : 18,412 = 18,412 : x
  2. Step 2: Convert to fraction form
    8,402/18,412 = 18,412/x
  3. Step 3: Cross multiply
    8,402x = 18,412 × 18,412
  4. Step 4: Simplify right side
    8,402x = 339,001,744
  5. Step 5: Solve for x
    x = 339,001,744/8,402
  6. Step 6: Final answer
    x = 40,347.74

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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.