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Finding the Fourth Proportional to 52.62, 78.90 and 18.37

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Solution

The fourth proportional to 52.62, 78.90 and 18.37 is: 27.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.62 : 78.90 = 18.37 : x
  2. Step 2: Convert to fraction form
    52.62/78.90 = 18.37/x
  3. Step 3: Cross multiply
    52.62x = 78.90 × 18.37
  4. Step 4: Simplify right side
    52.62x = 1,449.39
  5. Step 5: Solve for x
    x = 1,449.39/52.62
  6. Step 6: Final answer
    x = 27.54

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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.