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Finding the Third Proportional to 21,431 and 46,081

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Solution

The third proportional to 21,431 and 46,081 is: 99,083.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431 : 46,081 = 46,081 : x
  2. Step 2: Convert to fraction form
    21,431/46,081 = 46,081/x
  3. Step 3: Cross multiply
    21,431x = 46,081 × 46,081
  4. Step 4: Simplify right side
    21,431x = 2,123,458,561
  5. Step 5: Solve for x
    x = 2,123,458,561/21,431
  6. Step 6: Final answer
    x = 99,083.50

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.