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Finding the Fourth Proportional to 14.54, 20.20 and 14.32

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Solution

The fourth proportional to 14.54, 20.20 and 14.32 is: 19.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.54 : 20.20 = 14.32 : x
  2. Step 2: Convert to fraction form
    14.54/20.20 = 14.32/x
  3. Step 3: Cross multiply
    14.54x = 20.20 × 14.32
  4. Step 4: Simplify right side
    14.54x = 289.26
  5. Step 5: Solve for x
    x = 289.26/14.54
  6. Step 6: Final answer
    x = 19.89

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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.