Home / 8,520.20-11,759.94-5,687.72

Finding the Fourth Proportional to 8,520.20, 11,759.94 and 5,687.72

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Solution

The fourth proportional to 8,520.20, 11,759.94 and 5,687.72 is: 7,850.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.20 : 11,759.94 = 5,687.72 : x
  2. Step 2: Convert to fraction form
    8,520.20/11,759.94 = 5,687.72/x
  3. Step 3: Cross multiply
    8,520.20x = 11,759.94 × 5,687.72
  4. Step 4: Simplify right side
    8,520.20x = 66,887,245.94
  5. Step 5: Solve for x
    x = 66,887,245.94/8,520.20
  6. Step 6: Final answer
    x = 7,850.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.