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Finding the Fourth Proportional to 18, 24.86 and 14.38

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Solution

The fourth proportional to 18, 24.86 and 14.38 is: 19.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18 : 24.86 = 14.38 : x
  2. Step 2: Convert to fraction form
    18/24.86 = 14.38/x
  3. Step 3: Cross multiply
    18x = 24.86 × 14.38
  4. Step 4: Simplify right side
    18x = 357.49
  5. Step 5: Solve for x
    x = 357.49/18
  6. Step 6: Final answer
    x = 19.86

Related Problems

Find fourth proportional to 9, 12.43 and 7.19
Half scale
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Double scale
Find fourth proportional to 19, 26.24 and 15.38
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.