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Finding the Third Proportional to 5,728 and 12,788

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Solution

The third proportional to 5,728 and 12,788 is: 28,549.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,728 : 12,788 = 12,788 : x
  2. Step 2: Convert to fraction form
    5,728/12,788 = 12,788/x
  3. Step 3: Cross multiply
    5,728x = 12,788 × 12,788
  4. Step 4: Simplify right side
    5,728x = 163,532,944
  5. Step 5: Solve for x
    x = 163,532,944/5,728
  6. Step 6: Final answer
    x = 28,549.75

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.