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Finding the Fourth Proportional to 27.43, 37.89 and 21.97

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Solution

The fourth proportional to 27.43, 37.89 and 21.97 is: 30.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.43 : 37.89 = 21.97 : x
  2. Step 2: Convert to fraction form
    27.43/37.89 = 21.97/x
  3. Step 3: Cross multiply
    27.43x = 37.89 × 21.97
  4. Step 4: Simplify right side
    27.43x = 832.44
  5. Step 5: Solve for x
    x = 832.44/27.43
  6. Step 6: Final answer
    x = 30.35

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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.