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Finding the Fourth Proportional to 16.20, 22.35 and 10.05

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Solution

The fourth proportional to 16.20, 22.35 and 10.05 is: 13.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.20 : 22.35 = 10.05 : x
  2. Step 2: Convert to fraction form
    16.20/22.35 = 10.05/x
  3. Step 3: Cross multiply
    16.20x = 22.35 × 10.05
  4. Step 4: Simplify right side
    16.20x = 224.71
  5. Step 5: Solve for x
    x = 224.71/16.20
  6. Step 6: Final answer
    x = 13.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.