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Finding the Fourth Proportional to 11.01, 16.51 and 6.43

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Solution

The fourth proportional to 11.01, 16.51 and 6.43 is: 9.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.01 : 16.51 = 6.43 : x
  2. Step 2: Convert to fraction form
    11.01/16.51 = 6.43/x
  3. Step 3: Cross multiply
    11.01x = 16.51 × 6.43
  4. Step 4: Simplify right side
    11.01x = 106.16
  5. Step 5: Solve for x
    x = 106.16/11.01
  6. Step 6: Final answer
    x = 9.64

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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.