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Finding the Fourth Proportional to 16.80, 23 and 15.96

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Solution

The fourth proportional to 16.80, 23 and 15.96 is: 21.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.80 : 23 = 15.96 : x
  2. Step 2: Convert to fraction form
    16.80/23 = 15.96/x
  3. Step 3: Cross multiply
    16.80x = 23 × 15.96
  4. Step 4: Simplify right side
    16.80x = 367.08
  5. Step 5: Solve for x
    x = 367.08/16.80
  6. Step 6: Final answer
    x = 21.85

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1.5x scale

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.