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Finding the Third Proportional to 21,439 and 46,455

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Solution

The third proportional to 21,439 and 46,455 is: 100,660.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439 : 46,455 = 46,455 : x
  2. Step 2: Convert to fraction form
    21,439/46,455 = 46,455/x
  3. Step 3: Cross multiply
    21,439x = 46,455 × 46,455
  4. Step 4: Simplify right side
    21,439x = 2,158,067,025
  5. Step 5: Solve for x
    x = 2,158,067,025/21,439
  6. Step 6: Final answer
    x = 100,660.81

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.