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Finding the Fourth Proportional to 14.85, 20.60 and 14.24

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Solution

The fourth proportional to 14.85, 20.60 and 14.24 is: 19.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.85 : 20.60 = 14.24 : x
  2. Step 2: Convert to fraction form
    14.85/20.60 = 14.24/x
  3. Step 3: Cross multiply
    14.85x = 20.60 × 14.24
  4. Step 4: Simplify right side
    14.85x = 293.34
  5. Step 5: Solve for x
    x = 293.34/14.85
  6. Step 6: Final answer
    x = 19.75

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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.