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Finding the Fourth Proportional to 56.21, 84.27 and 21.97

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Solution

The fourth proportional to 56.21, 84.27 and 21.97 is: 32.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.21 : 84.27 = 21.97 : x
  2. Step 2: Convert to fraction form
    56.21/84.27 = 21.97/x
  3. Step 3: Cross multiply
    56.21x = 84.27 × 21.97
  4. Step 4: Simplify right side
    56.21x = 1,850.99
  5. Step 5: Solve for x
    x = 1,850.99/56.21
  6. Step 6: Final answer
    x = 32.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.