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Finding the Third Proportional to 13,890 and 28,728

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Solution

The third proportional to 13,890 and 28,728 is: 59,416.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890 : 28,728 = 28,728 : x
  2. Step 2: Convert to fraction form
    13,890/28,728 = 28,728/x
  3. Step 3: Cross multiply
    13,890x = 28,728 × 28,728
  4. Step 4: Simplify right side
    13,890x = 825,297,984
  5. Step 5: Solve for x
    x = 825,297,984/13,890
  6. Step 6: Final answer
    x = 59,416.70

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.