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Finding the Fourth Proportional to 23.42, 35.16 and 19.20

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Solution

The fourth proportional to 23.42, 35.16 and 19.20 is: 28.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.42 : 35.16 = 19.20 : x
  2. Step 2: Convert to fraction form
    23.42/35.16 = 19.20/x
  3. Step 3: Cross multiply
    23.42x = 35.16 × 19.20
  4. Step 4: Simplify right side
    23.42x = 674.89
  5. Step 5: Solve for x
    x = 674.89/23.42
  6. Step 6: Final answer
    x = 28.81

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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.