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Finding the Fourth Proportional to 16.20, 22.05 and 16.20

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Solution

The fourth proportional to 16.20, 22.05 and 16.20 is: 22.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.20 : 22.05 = 16.20 : x
  2. Step 2: Convert to fraction form
    16.20/22.05 = 16.20/x
  3. Step 3: Cross multiply
    16.20x = 22.05 × 16.20
  4. Step 4: Simplify right side
    16.20x = 357.21
  5. Step 5: Solve for x
    x = 357.21/16.20
  6. Step 6: Final answer
    x = 22.05

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.