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Finding the Third Proportional to 12,912 and 29,772

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Solution

The third proportional to 12,912 and 29,772 is: 68,647.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912 : 29,772 = 29,772 : x
  2. Step 2: Convert to fraction form
    12,912/29,772 = 29,772/x
  3. Step 3: Cross multiply
    12,912x = 29,772 × 29,772
  4. Step 4: Simplify right side
    12,912x = 886,371,984
  5. Step 5: Solve for x
    x = 886,371,984/12,912
  6. Step 6: Final answer
    x = 68,647.15

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.