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Finding the Fourth Proportional to 27, 40.37 and 20.52

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Solution

The fourth proportional to 27, 40.37 and 20.52 is: 30.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    27 : 40.37 = 20.52 : x
  2. Step 2: Convert to fraction form
    27/40.37 = 20.52/x
  3. Step 3: Cross multiply
    27x = 40.37 × 20.52
  4. Step 4: Simplify right side
    27x = 828.29
  5. Step 5: Solve for x
    x = 828.29/27
  6. Step 6: Final answer
    x = 30.68

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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.