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Finding the Third Proportional to 7,788 and 11,112

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Solution

The third proportional to 7,788 and 11,112 is: 15,854.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,788 : 11,112 = 11,112 : x
  2. Step 2: Convert to fraction form
    7,788/11,112 = 11,112/x
  3. Step 3: Cross multiply
    7,788x = 11,112 × 11,112
  4. Step 4: Simplify right side
    7,788x = 123,476,544
  5. Step 5: Solve for x
    x = 123,476,544/7,788
  6. Step 6: Final answer
    x = 15,854.72

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.