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Finding the Third Proportional to 21,381 and 46,781

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Solution

The third proportional to 21,381 and 46,781 is: 102,355.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381 : 46,781 = 46,781 : x
  2. Step 2: Convert to fraction form
    21,381/46,781 = 46,781/x
  3. Step 3: Cross multiply
    21,381x = 46,781 × 46,781
  4. Step 4: Simplify right side
    21,381x = 2,188,461,961
  5. Step 5: Solve for x
    x = 2,188,461,961/21,381
  6. Step 6: Final answer
    x = 102,355.45

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.