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Finding the Third Proportional to 21,970 and 47,917

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Solution

The third proportional to 21,970 and 47,917 is: 104,507.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970 : 47,917 = 47,917 : x
  2. Step 2: Convert to fraction form
    21,970/47,917 = 47,917/x
  3. Step 3: Cross multiply
    21,970x = 47,917 × 47,917
  4. Step 4: Simplify right side
    21,970x = 2,296,038,889
  5. Step 5: Solve for x
    x = 2,296,038,889/21,970
  6. Step 6: Final answer
    x = 104,507.91

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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.