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Finding the Fourth Proportional to 7,866.60, 11,799.89 and 5,393.91

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Solution

The fourth proportional to 7,866.60, 11,799.89 and 5,393.91 is: 8,090.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,866.60 : 11,799.89 = 5,393.91 : x
  2. Step 2: Convert to fraction form
    7,866.60/11,799.89 = 5,393.91/x
  3. Step 3: Cross multiply
    7,866.60x = 11,799.89 × 5,393.91
  4. Step 4: Simplify right side
    7,866.60x = 63,647,517.70
  5. Step 5: Solve for x
    x = 63,647,517.70/7,866.60
  6. Step 6: Final answer
    x = 8,090.85

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Similar ratio
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1.5x scale

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.