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Finding the Fourth Proportional to 7.87, 11.83 and 5.34

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Solution

The fourth proportional to 7.87, 11.83 and 5.34 is: 8.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.87 : 11.83 = 5.34 : x
  2. Step 2: Convert to fraction form
    7.87/11.83 = 5.34/x
  3. Step 3: Cross multiply
    7.87x = 11.83 × 5.34
  4. Step 4: Simplify right side
    7.87x = 63.17
  5. Step 5: Solve for x
    x = 63.17/7.87
  6. Step 6: Final answer
    x = 8.03

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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.