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Finding the Fourth Proportional to 26.34, 39.36 and 18.69

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Solution

The fourth proportional to 26.34, 39.36 and 18.69 is: 27.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.34 : 39.36 = 18.69 : x
  2. Step 2: Convert to fraction form
    26.34/39.36 = 18.69/x
  3. Step 3: Cross multiply
    26.34x = 39.36 × 18.69
  4. Step 4: Simplify right side
    26.34x = 735.64
  5. Step 5: Solve for x
    x = 735.64/26.34
  6. Step 6: Final answer
    x = 27.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.