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Finding the Fourth Proportional to 7,891.70, 11,837.55 and 7,410.56

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Solution

The fourth proportional to 7,891.70, 11,837.55 and 7,410.56 is: 11,115.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.70 : 11,837.55 = 7,410.56 : x
  2. Step 2: Convert to fraction form
    7,891.70/11,837.55 = 7,410.56/x
  3. Step 3: Cross multiply
    7,891.70x = 11,837.55 × 7,410.56
  4. Step 4: Simplify right side
    7,891.70x = 87,722,874.53
  5. Step 5: Solve for x
    x = 87,722,874.53/7,891.70
  6. Step 6: Final answer
    x = 11,115.84

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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.