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Finding the Third Proportional to 21,555 and 46,391

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Solution

The third proportional to 21,555 and 46,391 is: 99,843.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555 : 46,391 = 46,391 : x
  2. Step 2: Convert to fraction form
    21,555/46,391 = 46,391/x
  3. Step 3: Cross multiply
    21,555x = 46,391 × 46,391
  4. Step 4: Simplify right side
    21,555x = 2,152,124,881
  5. Step 5: Solve for x
    x = 2,152,124,881/21,555
  6. Step 6: Final answer
    x = 99,843.42

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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.