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Finding the Fourth Proportional to 18, 24.81 and 14.92

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Solution

The fourth proportional to 18, 24.81 and 14.92 is: 20.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18 : 24.81 = 14.92 : x
  2. Step 2: Convert to fraction form
    18/24.81 = 14.92/x
  3. Step 3: Cross multiply
    18x = 24.81 × 14.92
  4. Step 4: Simplify right side
    18x = 370.17
  5. Step 5: Solve for x
    x = 370.17/18
  6. Step 6: Final answer
    x = 20.56

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.