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Finding the Fourth Proportional to 38.42, 53 and 22.87

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Solution

The fourth proportional to 38.42, 53 and 22.87 is: 31.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.42 : 53 = 22.87 : x
  2. Step 2: Convert to fraction form
    38.42/53 = 22.87/x
  3. Step 3: Cross multiply
    38.42x = 53 × 22.87
  4. Step 4: Simplify right side
    38.42x = 1,212.11
  5. Step 5: Solve for x
    x = 1,212.11/38.42
  6. Step 6: Final answer
    x = 31.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.