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Finding the Fourth Proportional to 34.55, 51.78 and 18.50

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Solution

The fourth proportional to 34.55, 51.78 and 18.50 is: 27.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.55 : 51.78 = 18.50 : x
  2. Step 2: Convert to fraction form
    34.55/51.78 = 18.50/x
  3. Step 3: Cross multiply
    34.55x = 51.78 × 18.50
  4. Step 4: Simplify right side
    34.55x = 957.93
  5. Step 5: Solve for x
    x = 957.93/34.55
  6. Step 6: Final answer
    x = 27.73

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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.