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Finding the Fourth Proportional to 20.37, 30.38 and 19.35

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Solution

The fourth proportional to 20.37, 30.38 and 19.35 is: 28.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.37 : 30.38 = 19.35 : x
  2. Step 2: Convert to fraction form
    20.37/30.38 = 19.35/x
  3. Step 3: Cross multiply
    20.37x = 30.38 × 19.35
  4. Step 4: Simplify right side
    20.37x = 587.76
  5. Step 5: Solve for x
    x = 587.76/20.37
  6. Step 6: Final answer
    x = 28.85

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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.