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Finding the Fourth Proportional to 11.31, 15.51 and 10.54

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Solution

The fourth proportional to 11.31, 15.51 and 10.54 is: 14.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.31 : 15.51 = 10.54 : x
  2. Step 2: Convert to fraction form
    11.31/15.51 = 10.54/x
  3. Step 3: Cross multiply
    11.31x = 15.51 × 10.54
  4. Step 4: Simplify right side
    11.31x = 163.53
  5. Step 5: Solve for x
    x = 163.53/11.31
  6. Step 6: Final answer
    x = 14.46

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.