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Finding the Third Proportional to 7,740 and 11,057

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Solution

The third proportional to 7,740 and 11,057 is: 15,795.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,740 : 11,057 = 11,057 : x
  2. Step 2: Convert to fraction form
    7,740/11,057 = 11,057/x
  3. Step 3: Cross multiply
    7,740x = 11,057 × 11,057
  4. Step 4: Simplify right side
    7,740x = 122,257,249
  5. Step 5: Solve for x
    x = 122,257,249/7,740
  6. Step 6: Final answer
    x = 15,795.51

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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.