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Finding the Fourth Proportional to 18.55, 27.87 and 15.67

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Solution

The fourth proportional to 18.55, 27.87 and 15.67 is: 23.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.55 : 27.87 = 15.67 : x
  2. Step 2: Convert to fraction form
    18.55/27.87 = 15.67/x
  3. Step 3: Cross multiply
    18.55x = 27.87 × 15.67
  4. Step 4: Simplify right side
    18.55x = 436.72
  5. Step 5: Solve for x
    x = 436.72/18.55
  6. Step 6: Final answer
    x = 23.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.