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Finding the Fourth Proportional to 16.83, 25.38 and 15.39

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Solution

The fourth proportional to 16.83, 25.38 and 15.39 is: 23.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.83 : 25.38 = 15.39 : x
  2. Step 2: Convert to fraction form
    16.83/25.38 = 15.39/x
  3. Step 3: Cross multiply
    16.83x = 25.38 × 15.39
  4. Step 4: Simplify right side
    16.83x = 390.60
  5. Step 5: Solve for x
    x = 390.60/16.83
  6. Step 6: Final answer
    x = 23.21

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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.