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Finding the Fourth Proportional to 10.11, 13.89 and 9.45

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Solution

The fourth proportional to 10.11, 13.89 and 9.45 is: 12.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.11 : 13.89 = 9.45 : x
  2. Step 2: Convert to fraction form
    10.11/13.89 = 9.45/x
  3. Step 3: Cross multiply
    10.11x = 13.89 × 9.45
  4. Step 4: Simplify right side
    10.11x = 131.26
  5. Step 5: Solve for x
    x = 131.26/10.11
  6. Step 6: Final answer
    x = 12.98

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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.