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Finding the Fourth Proportional to 20.19, 28.01 and 20.01

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Solution

The fourth proportional to 20.19, 28.01 and 20.01 is: 27.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.19 : 28.01 = 20.01 : x
  2. Step 2: Convert to fraction form
    20.19/28.01 = 20.01/x
  3. Step 3: Cross multiply
    20.19x = 28.01 × 20.01
  4. Step 4: Simplify right side
    20.19x = 560.49
  5. Step 5: Solve for x
    x = 560.49/20.19
  6. Step 6: Final answer
    x = 27.77

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.