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Finding the Fourth Proportional to 8,087.45, 11,087.89 and 7,939.82

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Solution

The fourth proportional to 8,087.45, 11,087.89 and 7,939.82 is: 10,885.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,087.45 : 11,087.89 = 7,939.82 : x
  2. Step 2: Convert to fraction form
    8,087.45/11,087.89 = 7,939.82/x
  3. Step 3: Cross multiply
    8,087.45x = 11,087.89 × 7,939.82
  4. Step 4: Simplify right side
    8,087.45x = 88,035,858.65
  5. Step 5: Solve for x
    x = 88,035,858.65/8,087.45
  6. Step 6: Final answer
    x = 10,885.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.