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Finding the Fourth Proportional to 20.32, 28 and 14.82

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Solution

The fourth proportional to 20.32, 28 and 14.82 is: 20.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.32 : 28 = 14.82 : x
  2. Step 2: Convert to fraction form
    20.32/28 = 14.82/x
  3. Step 3: Cross multiply
    20.32x = 28 × 14.82
  4. Step 4: Simplify right side
    20.32x = 414.96
  5. Step 5: Solve for x
    x = 414.96/20.32
  6. Step 6: Final answer
    x = 20.42

Related Problems

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.