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Finding the Fourth Proportional to 24.21, 36.30 and 18.57

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Solution

The fourth proportional to 24.21, 36.30 and 18.57 is: 27.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.21 : 36.30 = 18.57 : x
  2. Step 2: Convert to fraction form
    24.21/36.30 = 18.57/x
  3. Step 3: Cross multiply
    24.21x = 36.30 × 18.57
  4. Step 4: Simplify right side
    24.21x = 674.09
  5. Step 5: Solve for x
    x = 674.09/24.21
  6. Step 6: Final answer
    x = 27.84

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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.