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Finding the Third Proportional to 18,031 and 39,382

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Solution

The third proportional to 18,031 and 39,382 is: 86,015.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,031 : 39,382 = 39,382 : x
  2. Step 2: Convert to fraction form
    18,031/39,382 = 39,382/x
  3. Step 3: Cross multiply
    18,031x = 39,382 × 39,382
  4. Step 4: Simplify right side
    18,031x = 1,550,941,924
  5. Step 5: Solve for x
    x = 1,550,941,924/18,031
  6. Step 6: Final answer
    x = 86,015.30

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.