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Finding the Fourth Proportional to 16.01, 22.21 and 15.66

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Solution

The fourth proportional to 16.01, 22.21 and 15.66 is: 21.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.01 : 22.21 = 15.66 : x
  2. Step 2: Convert to fraction form
    16.01/22.21 = 15.66/x
  3. Step 3: Cross multiply
    16.01x = 22.21 × 15.66
  4. Step 4: Simplify right side
    16.01x = 347.81
  5. Step 5: Solve for x
    x = 347.81/16.01
  6. Step 6: Final answer
    x = 21.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.