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Finding the Fourth Proportional to 11, 16.51 and 5.66

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Solution

The fourth proportional to 11, 16.51 and 5.66 is: 8.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11 : 16.51 = 5.66 : x
  2. Step 2: Convert to fraction form
    11/16.51 = 5.66/x
  3. Step 3: Cross multiply
    11x = 16.51 × 5.66
  4. Step 4: Simplify right side
    11x = 93.34
  5. Step 5: Solve for x
    x = 93.34/11
  6. Step 6: Final answer
    x = 8.49

Related Problems

Find fourth proportional to 5.50, 8.25 and 2.83
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Double scale
Find fourth proportional to 12, 18.01 and 6.66
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.