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Finding the Fourth Proportional to 20.42, 30.41 and 20.37

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Solution

The fourth proportional to 20.42, 30.41 and 20.37 is: 30.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.42 : 30.41 = 20.37 : x
  2. Step 2: Convert to fraction form
    20.42/30.41 = 20.37/x
  3. Step 3: Cross multiply
    20.42x = 30.41 × 20.37
  4. Step 4: Simplify right side
    20.42x = 619.35
  5. Step 5: Solve for x
    x = 619.35/20.42
  6. Step 6: Final answer
    x = 30.34

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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.