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Finding the Third Proportional to 18,470 and 40,630

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Solution

The third proportional to 18,470 and 40,630 is: 89,377.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,470 : 40,630 = 40,630 : x
  2. Step 2: Convert to fraction form
    18,470/40,630 = 40,630/x
  3. Step 3: Cross multiply
    18,470x = 40,630 × 40,630
  4. Step 4: Simplify right side
    18,470x = 1,650,796,900
  5. Step 5: Solve for x
    x = 1,650,796,900/18,470
  6. Step 6: Final answer
    x = 89,377.20

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.