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Finding the Fourth Proportional to 21.94, 33.04 and 16.90

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Solution

The fourth proportional to 21.94, 33.04 and 16.90 is: 25.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.94 : 33.04 = 16.90 : x
  2. Step 2: Convert to fraction form
    21.94/33.04 = 16.90/x
  3. Step 3: Cross multiply
    21.94x = 33.04 × 16.90
  4. Step 4: Simplify right side
    21.94x = 558.38
  5. Step 5: Solve for x
    x = 558.38/21.94
  6. Step 6: Final answer
    x = 25.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.