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Finding the Third Proportional to 21,818 and 47,122

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Solution

The third proportional to 21,818 and 47,122 is: 101,772.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818 : 47,122 = 47,122 : x
  2. Step 2: Convert to fraction form
    21,818/47,122 = 47,122/x
  3. Step 3: Cross multiply
    21,818x = 47,122 × 47,122
  4. Step 4: Simplify right side
    21,818x = 2,220,482,884
  5. Step 5: Solve for x
    x = 2,220,482,884/21,818
  6. Step 6: Final answer
    x = 101,772.98

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.