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Finding the Fourth Proportional to 26, 35.78 and 22.70

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Solution

The fourth proportional to 26, 35.78 and 22.70 is: 31.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    26 : 35.78 = 22.70 : x
  2. Step 2: Convert to fraction form
    26/35.78 = 22.70/x
  3. Step 3: Cross multiply
    26x = 35.78 × 22.70
  4. Step 4: Simplify right side
    26x = 812.21
  5. Step 5: Solve for x
    x = 812.21/26
  6. Step 6: Final answer
    x = 31.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.