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Finding the Fourth Proportional to 16, 22.05 and 11.39

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Solution

The fourth proportional to 16, 22.05 and 11.39 is: 15.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16 : 22.05 = 11.39 : x
  2. Step 2: Convert to fraction form
    16/22.05 = 11.39/x
  3. Step 3: Cross multiply
    16x = 22.05 × 11.39
  4. Step 4: Simplify right side
    16x = 251.15
  5. Step 5: Solve for x
    x = 251.15/16
  6. Step 6: Final answer
    x = 15.70

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.