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Finding the Fourth Proportional to 27.21, 40.62 and 25.43

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Solution

The fourth proportional to 27.21, 40.62 and 25.43 is: 37.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.21 : 40.62 = 25.43 : x
  2. Step 2: Convert to fraction form
    27.21/40.62 = 25.43/x
  3. Step 3: Cross multiply
    27.21x = 40.62 × 25.43
  4. Step 4: Simplify right side
    27.21x = 1,032.84
  5. Step 5: Solve for x
    x = 1,032.84/27.21
  6. Step 6: Final answer
    x = 37.96

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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.