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Finding the Third Proportional to 21,671 and 47,310

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Solution

The third proportional to 21,671 and 47,310 is: 103,282.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671 : 47,310 = 47,310 : x
  2. Step 2: Convert to fraction form
    21,671/47,310 = 47,310/x
  3. Step 3: Cross multiply
    21,671x = 47,310 × 47,310
  4. Step 4: Simplify right side
    21,671x = 2,238,236,100
  5. Step 5: Solve for x
    x = 2,238,236,100/21,671
  6. Step 6: Final answer
    x = 103,282.55

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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.