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Finding the Third Proportional to 7.88 and 20.94

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Solution

The third proportional to 7.88 and 20.94 is: 55.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.88 : 20.94 = 20.94 : x
  2. Step 2: Convert to fraction form
    7.88/20.94 = 20.94/x
  3. Step 3: Cross multiply
    7.88x = 20.94 × 20.94
  4. Step 4: Simplify right side
    7.88x = 438.38
  5. Step 5: Solve for x
    x = 438.38/7.88
  6. Step 6: Final answer
    x = 55.67

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Why These Related Problems?

These problems maintain the same ratio (2.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.