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Finding the Third Proportional to 7,788 and 11,136

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Solution

The third proportional to 7,788 and 11,136 is: 15,923.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,788 : 11,136 = 11,136 : x
  2. Step 2: Convert to fraction form
    7,788/11,136 = 11,136/x
  3. Step 3: Cross multiply
    7,788x = 11,136 × 11,136
  4. Step 4: Simplify right side
    7,788x = 124,010,496
  5. Step 5: Solve for x
    x = 124,010,496/7,788
  6. Step 6: Final answer
    x = 15,923.28

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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.