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Finding the Fourth Proportional to 36.93, 50.96 and 21.38

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Solution

The fourth proportional to 36.93, 50.96 and 21.38 is: 29.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.93 : 50.96 = 21.38 : x
  2. Step 2: Convert to fraction form
    36.93/50.96 = 21.38/x
  3. Step 3: Cross multiply
    36.93x = 50.96 × 21.38
  4. Step 4: Simplify right side
    36.93x = 1,089.42
  5. Step 5: Solve for x
    x = 1,089.42/36.93
  6. Step 6: Final answer
    x = 29.50

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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.