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Finding the Fourth Proportional to 18.74, 25.68 and 18.11

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Solution

The fourth proportional to 18.74, 25.68 and 18.11 is: 24.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.74 : 25.68 = 18.11 : x
  2. Step 2: Convert to fraction form
    18.74/25.68 = 18.11/x
  3. Step 3: Cross multiply
    18.74x = 25.68 × 18.11
  4. Step 4: Simplify right side
    18.74x = 465.06
  5. Step 5: Solve for x
    x = 465.06/18.74
  6. Step 6: Final answer
    x = 24.82

Related Problems

Find fourth proportional to 9.37, 12.84 and 9.06
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.