Home / 7,840.89-11,757.78-5,640.39

Finding the Fourth Proportional to 7,840.89, 11,757.78 and 5,640.39

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Solution

The fourth proportional to 7,840.89, 11,757.78 and 5,640.39 is: 8,458.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.89 : 11,757.78 = 5,640.39 : x
  2. Step 2: Convert to fraction form
    7,840.89/11,757.78 = 5,640.39/x
  3. Step 3: Cross multiply
    7,840.89x = 11,757.78 × 5,640.39
  4. Step 4: Simplify right side
    7,840.89x = 66,318,464.73
  5. Step 5: Solve for x
    x = 66,318,464.73/7,840.89
  6. Step 6: Final answer
    x = 8,458.03

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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.