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Finding the Fourth Proportional to 27.50, 37.72 and 26.81

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Solution

The fourth proportional to 27.50, 37.72 and 26.81 is: 36.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.50 : 37.72 = 26.81 : x
  2. Step 2: Convert to fraction form
    27.50/37.72 = 26.81/x
  3. Step 3: Cross multiply
    27.50x = 37.72 × 26.81
  4. Step 4: Simplify right side
    27.50x = 1,011.47
  5. Step 5: Solve for x
    x = 1,011.47/27.50
  6. Step 6: Final answer
    x = 36.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.