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Finding the Third Proportional to 21,518 and 47,386

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Solution

The third proportional to 21,518 and 47,386 is: 104,351.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518 : 47,386 = 47,386 : x
  2. Step 2: Convert to fraction form
    21,518/47,386 = 47,386/x
  3. Step 3: Cross multiply
    21,518x = 47,386 × 47,386
  4. Step 4: Simplify right side
    21,518x = 2,245,432,996
  5. Step 5: Solve for x
    x = 2,245,432,996/21,518
  6. Step 6: Final answer
    x = 104,351.38

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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.