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Finding the Fourth Proportional to 16.20, 24.20 and 13.50

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Solution

The fourth proportional to 16.20, 24.20 and 13.50 is: 20.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.20 : 24.20 = 13.50 : x
  2. Step 2: Convert to fraction form
    16.20/24.20 = 13.50/x
  3. Step 3: Cross multiply
    16.20x = 24.20 × 13.50
  4. Step 4: Simplify right side
    16.20x = 326.63
  5. Step 5: Solve for x
    x = 326.63/16.20
  6. Step 6: Final answer
    x = 20.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.