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Finding the Third Proportional to 8,405 and 17,619

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Solution

The third proportional to 8,405 and 17,619 is: 36,933.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405 : 17,619 = 17,619 : x
  2. Step 2: Convert to fraction form
    8,405/17,619 = 17,619/x
  3. Step 3: Cross multiply
    8,405x = 17,619 × 17,619
  4. Step 4: Simplify right side
    8,405x = 310,429,161
  5. Step 5: Solve for x
    x = 310,429,161/8,405
  6. Step 6: Final answer
    x = 36,933.87

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.