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Finding the Third Proportional to 18,438 and 38,382

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Solution

The third proportional to 18,438 and 38,382 is: 79,899.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438 : 38,382 = 38,382 : x
  2. Step 2: Convert to fraction form
    18,438/38,382 = 38,382/x
  3. Step 3: Cross multiply
    18,438x = 38,382 × 38,382
  4. Step 4: Simplify right side
    18,438x = 1,473,177,924
  5. Step 5: Solve for x
    x = 1,473,177,924/18,438
  6. Step 6: Final answer
    x = 79,899.01

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.