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Finding the Third Proportional to 8,112 and 11,316

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Solution

The third proportional to 8,112 and 11,316 is: 15,785.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112 : 11,316 = 11,316 : x
  2. Step 2: Convert to fraction form
    8,112/11,316 = 11,316/x
  3. Step 3: Cross multiply
    8,112x = 11,316 × 11,316
  4. Step 4: Simplify right side
    8,112x = 128,051,856
  5. Step 5: Solve for x
    x = 128,051,856/8,112
  6. Step 6: Final answer
    x = 15,785.49

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.