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Finding the Third Proportional to 15,936 and 21,856

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Solution

The third proportional to 15,936 and 21,856 is: 29,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,936 : 21,856 = 21,856 : x
  2. Step 2: Convert to fraction form
    15,936/21,856 = 21,856/x
  3. Step 3: Cross multiply
    15,936x = 21,856 × 21,856
  4. Step 4: Simplify right side
    15,936x = 477,684,736
  5. Step 5: Solve for x
    x = 477,684,736/15,936
  6. Step 6: Final answer
    x = 29,975.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.