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Finding the Fourth Proportional to 26.86, 37.06 and 21.94

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Solution

The fourth proportional to 26.86, 37.06 and 21.94 is: 30.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.86 : 37.06 = 21.94 : x
  2. Step 2: Convert to fraction form
    26.86/37.06 = 21.94/x
  3. Step 3: Cross multiply
    26.86x = 37.06 × 21.94
  4. Step 4: Simplify right side
    26.86x = 813.10
  5. Step 5: Solve for x
    x = 813.10/26.86
  6. Step 6: Final answer
    x = 30.27

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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.