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Finding the Fourth Proportional to 15.15, 22.81 and 13.27

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Solution

The fourth proportional to 15.15, 22.81 and 13.27 is: 19.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.15 : 22.81 = 13.27 : x
  2. Step 2: Convert to fraction form
    15.15/22.81 = 13.27/x
  3. Step 3: Cross multiply
    15.15x = 22.81 × 13.27
  4. Step 4: Simplify right side
    15.15x = 302.69
  5. Step 5: Solve for x
    x = 302.69/15.15
  6. Step 6: Final answer
    x = 19.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.