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Finding the Third Proportional to 12,728 and 18,894

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Solution

The third proportional to 12,728 and 18,894 is: 28,047.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728 : 18,894 = 18,894 : x
  2. Step 2: Convert to fraction form
    12,728/18,894 = 18,894/x
  3. Step 3: Cross multiply
    12,728x = 18,894 × 18,894
  4. Step 4: Simplify right side
    12,728x = 356,983,236
  5. Step 5: Solve for x
    x = 356,983,236/12,728
  6. Step 6: Final answer
    x = 28,047.08

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.