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Finding the Fourth Proportional to 24, 35.85 and 20.64

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Solution

The fourth proportional to 24, 35.85 and 20.64 is: 30.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    24 : 35.85 = 20.64 : x
  2. Step 2: Convert to fraction form
    24/35.85 = 20.64/x
  3. Step 3: Cross multiply
    24x = 35.85 × 20.64
  4. Step 4: Simplify right side
    24x = 739.94
  5. Step 5: Solve for x
    x = 739.94/24
  6. Step 6: Final answer
    x = 30.83

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1.5x scale

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.