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Finding the Fourth Proportional to 27, 40.36 and 20.96

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Solution

The fourth proportional to 27, 40.36 and 20.96 is: 31.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    27 : 40.36 = 20.96 : x
  2. Step 2: Convert to fraction form
    27/40.36 = 20.96/x
  3. Step 3: Cross multiply
    27x = 40.36 × 20.96
  4. Step 4: Simplify right side
    27x = 845.95
  5. Step 5: Solve for x
    x = 845.95/27
  6. Step 6: Final answer
    x = 31.33

Related Problems

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.