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Finding the Third Proportional to 18,621 and 37,782

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Solution

The third proportional to 18,621 and 37,782 is: 76,659.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,621 : 37,782 = 37,782 : x
  2. Step 2: Convert to fraction form
    18,621/37,782 = 37,782/x
  3. Step 3: Cross multiply
    18,621x = 37,782 × 37,782
  4. Step 4: Simplify right side
    18,621x = 1,427,479,524
  5. Step 5: Solve for x
    x = 1,427,479,524/18,621
  6. Step 6: Final answer
    x = 76,659.66

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.