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Finding the Third Proportional to 9.18 and 13.45

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Solution

The third proportional to 9.18 and 13.45 is: 19.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.18 : 13.45 = 13.45 : x
  2. Step 2: Convert to fraction form
    9.18/13.45 = 13.45/x
  3. Step 3: Cross multiply
    9.18x = 13.45 × 13.45
  4. Step 4: Simplify right side
    9.18x = 180.83
  5. Step 5: Solve for x
    x = 180.83/9.18
  6. Step 6: Final answer
    x = 19.71

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.