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Finding the Fourth Proportional to 29.10, 43.59 and 18.39

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Solution

The fourth proportional to 29.10, 43.59 and 18.39 is: 27.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.10 : 43.59 = 18.39 : x
  2. Step 2: Convert to fraction form
    29.10/43.59 = 18.39/x
  3. Step 3: Cross multiply
    29.10x = 43.59 × 18.39
  4. Step 4: Simplify right side
    29.10x = 801.62
  5. Step 5: Solve for x
    x = 801.62/29.10
  6. Step 6: Final answer
    x = 27.55

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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.