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Finding the Third Proportional to 18,356 and 40,505

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Solution

The third proportional to 18,356 and 40,505 is: 89,379.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356 : 40,505 = 40,505 : x
  2. Step 2: Convert to fraction form
    18,356/40,505 = 40,505/x
  3. Step 3: Cross multiply
    18,356x = 40,505 × 40,505
  4. Step 4: Simplify right side
    18,356x = 1,640,655,025
  5. Step 5: Solve for x
    x = 1,640,655,025/18,356
  6. Step 6: Final answer
    x = 89,379.77

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.