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Finding the Third Proportional to 18,171 and 19,368

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Solution

The third proportional to 18,171 and 19,368 is: 20,643.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,171 : 19,368 = 19,368 : x
  2. Step 2: Convert to fraction form
    18,171/19,368 = 19,368/x
  3. Step 3: Cross multiply
    18,171x = 19,368 × 19,368
  4. Step 4: Simplify right side
    18,171x = 375,119,424
  5. Step 5: Solve for x
    x = 375,119,424/18,171
  6. Step 6: Final answer
    x = 20,643.85

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Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.