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Finding the Fourth Proportional to 10.66, 16.09 and 10.36

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Solution

The fourth proportional to 10.66, 16.09 and 10.36 is: 15.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.66 : 16.09 = 10.36 : x
  2. Step 2: Convert to fraction form
    10.66/16.09 = 10.36/x
  3. Step 3: Cross multiply
    10.66x = 16.09 × 10.36
  4. Step 4: Simplify right side
    10.66x = 166.69
  5. Step 5: Solve for x
    x = 166.69/10.66
  6. Step 6: Final answer
    x = 15.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.