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Finding the Third Proportional to 7,878.75 and 16,992.75

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Solution

The third proportional to 7,878.75 and 16,992.75 is: 36,649.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.75 : 16,992.75 = 16,992.75 : x
  2. Step 2: Convert to fraction form
    7,878.75/16,992.75 = 16,992.75/x
  3. Step 3: Cross multiply
    7,878.75x = 16,992.75 × 16,992.75
  4. Step 4: Simplify right side
    7,878.75x = 288,753,552.56
  5. Step 5: Solve for x
    x = 288,753,552.56/7,878.75
  6. Step 6: Final answer
    x = 36,649.67

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.