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Finding the Fourth Proportional to 10.91, 16.46 and 10.83

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Solution

The fourth proportional to 10.91, 16.46 and 10.83 is: 16.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.91 : 16.46 = 10.83 : x
  2. Step 2: Convert to fraction form
    10.91/16.46 = 10.83/x
  3. Step 3: Cross multiply
    10.91x = 16.46 × 10.83
  4. Step 4: Simplify right side
    10.91x = 178.21
  5. Step 5: Solve for x
    x = 178.21/10.91
  6. Step 6: Final answer
    x = 16.34

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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.