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Finding the Fourth Proportional to 36.72, 54.91 and 21.46

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Solution

The fourth proportional to 36.72, 54.91 and 21.46 is: 32.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.72 : 54.91 = 21.46 : x
  2. Step 2: Convert to fraction form
    36.72/54.91 = 21.46/x
  3. Step 3: Cross multiply
    36.72x = 54.91 × 21.46
  4. Step 4: Simplify right side
    36.72x = 1,178.37
  5. Step 5: Solve for x
    x = 1,178.37/36.72
  6. Step 6: Final answer
    x = 32.09

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