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Finding the Fourth Proportional to 24.21, 36.16 and 20.16

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Solution

The fourth proportional to 24.21, 36.16 and 20.16 is: 30.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.21 : 36.16 = 20.16 : x
  2. Step 2: Convert to fraction form
    24.21/36.16 = 20.16/x
  3. Step 3: Cross multiply
    24.21x = 36.16 × 20.16
  4. Step 4: Simplify right side
    24.21x = 728.99
  5. Step 5: Solve for x
    x = 728.99/24.21
  6. Step 6: Final answer
    x = 30.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.