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Finding the Third Proportional to 18,555 and 36,381

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Solution

The third proportional to 18,555 and 36,381 is: 71,332.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555 : 36,381 = 36,381 : x
  2. Step 2: Convert to fraction form
    18,555/36,381 = 36,381/x
  3. Step 3: Cross multiply
    18,555x = 36,381 × 36,381
  4. Step 4: Simplify right side
    18,555x = 1,323,577,161
  5. Step 5: Solve for x
    x = 1,323,577,161/18,555
  6. Step 6: Final answer
    x = 71,332.64

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Why These Related Problems?

These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.