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Finding the Fourth Proportional to 7,889.70, 11,834.55 and 3,993.60

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Solution

The fourth proportional to 7,889.70, 11,834.55 and 3,993.60 is: 5,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.70 : 11,834.55 = 3,993.60 : x
  2. Step 2: Convert to fraction form
    7,889.70/11,834.55 = 3,993.60/x
  3. Step 3: Cross multiply
    7,889.70x = 11,834.55 × 3,993.60
  4. Step 4: Simplify right side
    7,889.70x = 47,262,458.88
  5. Step 5: Solve for x
    x = 47,262,458.88/7,889.70
  6. Step 6: Final answer
    x = 5,990.40

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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.