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Finding the Fourth Proportional to 15.07, 20.83 and 11.81

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Solution

The fourth proportional to 15.07, 20.83 and 11.81 is: 16.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.07 : 20.83 = 11.81 : x
  2. Step 2: Convert to fraction form
    15.07/20.83 = 11.81/x
  3. Step 3: Cross multiply
    15.07x = 20.83 × 11.81
  4. Step 4: Simplify right side
    15.07x = 245.92
  5. Step 5: Solve for x
    x = 245.92/15.07
  6. Step 6: Final answer
    x = 16.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.