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Finding the Fourth Proportional to 7.89, 10.81 and 7.48

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Solution

The fourth proportional to 7.89, 10.81 and 7.48 is: 10.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.89 : 10.81 = 7.48 : x
  2. Step 2: Convert to fraction form
    7.89/10.81 = 7.48/x
  3. Step 3: Cross multiply
    7.89x = 10.81 × 7.48
  4. Step 4: Simplify right side
    7.89x = 80.86
  5. Step 5: Solve for x
    x = 80.86/7.89
  6. Step 6: Final answer
    x = 10.25

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