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Finding the Fourth Proportional to 20.02, 30.07 and 17.89

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Solution

The fourth proportional to 20.02, 30.07 and 17.89 is: 26.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.02 : 30.07 = 17.89 : x
  2. Step 2: Convert to fraction form
    20.02/30.07 = 17.89/x
  3. Step 3: Cross multiply
    20.02x = 30.07 × 17.89
  4. Step 4: Simplify right side
    20.02x = 537.98
  5. Step 5: Solve for x
    x = 537.98/20.02
  6. Step 6: Final answer
    x = 26.87

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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.