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Finding the Third Proportional to 12,576 and 21,408

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Solution

The third proportional to 12,576 and 21,408 is: 36,442.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,576 : 21,408 = 21,408 : x
  2. Step 2: Convert to fraction form
    12,576/21,408 = 21,408/x
  3. Step 3: Cross multiply
    12,576x = 21,408 × 21,408
  4. Step 4: Simplify right side
    12,576x = 458,302,464
  5. Step 5: Solve for x
    x = 458,302,464/12,576
  6. Step 6: Final answer
    x = 36,442.63

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.