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Finding the Fourth Proportional to 36.31, 54.47 and 14.65

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Solution

The fourth proportional to 36.31, 54.47 and 14.65 is: 21.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.31 : 54.47 = 14.65 : x
  2. Step 2: Convert to fraction form
    36.31/54.47 = 14.65/x
  3. Step 3: Cross multiply
    36.31x = 54.47 × 14.65
  4. Step 4: Simplify right side
    36.31x = 797.99
  5. Step 5: Solve for x
    x = 797.99/36.31
  6. Step 6: Final answer
    x = 21.98

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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.