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Finding the Fourth Proportional to 26.18, 39.13 and 19.34

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Solution

The fourth proportional to 26.18, 39.13 and 19.34 is: 28.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.18 : 39.13 = 19.34 : x
  2. Step 2: Convert to fraction form
    26.18/39.13 = 19.34/x
  3. Step 3: Cross multiply
    26.18x = 39.13 × 19.34
  4. Step 4: Simplify right side
    26.18x = 756.53
  5. Step 5: Solve for x
    x = 756.53/26.18
  6. Step 6: Final answer
    x = 28.90

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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.