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Finding the Fourth Proportional to 16.14, 24.21 and 9

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Solution

The fourth proportional to 16.14, 24.21 and 9 is: 13.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.14 : 24.21 = 9 : x
  2. Step 2: Convert to fraction form
    16.14/24.21 = 9/x
  3. Step 3: Cross multiply
    16.14x = 24.21 × 9
  4. Step 4: Simplify right side
    16.14x = 217.89
  5. Step 5: Solve for x
    x = 217.89/16.14
  6. Step 6: Final answer
    x = 13.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.