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Finding the Third Proportional to 9.93 and 21.77

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Solution

The third proportional to 9.93 and 21.77 is: 47.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.93 : 21.77 = 21.77 : x
  2. Step 2: Convert to fraction form
    9.93/21.77 = 21.77/x
  3. Step 3: Cross multiply
    9.93x = 21.77 × 21.77
  4. Step 4: Simplify right side
    9.93x = 474.02
  5. Step 5: Solve for x
    x = 474.02/9.93
  6. Step 6: Final answer
    x = 47.71

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.