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Finding the Fourth Proportional to 16.04, 21.99 and 15.71

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Solution

The fourth proportional to 16.04, 21.99 and 15.71 is: 21.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.04 : 21.99 = 15.71 : x
  2. Step 2: Convert to fraction form
    16.04/21.99 = 15.71/x
  3. Step 3: Cross multiply
    16.04x = 21.99 × 15.71
  4. Step 4: Simplify right side
    16.04x = 345.35
  5. Step 5: Solve for x
    x = 345.35/16.04
  6. Step 6: Final answer
    x = 21.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.