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Finding the Third Proportional to 18,340 and 38,480

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Solution

The third proportional to 18,340 and 38,480 is: 80,736.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,340 : 38,480 = 38,480 : x
  2. Step 2: Convert to fraction form
    18,340/38,480 = 38,480/x
  3. Step 3: Cross multiply
    18,340x = 38,480 × 38,480
  4. Step 4: Simplify right side
    18,340x = 1,480,710,400
  5. Step 5: Solve for x
    x = 1,480,710,400/18,340
  6. Step 6: Final answer
    x = 80,736.66

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.