Home / 8,517.20-11,755.80-5,684.72

Finding the Fourth Proportional to 8,517.20, 11,755.80 and 5,684.72

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Solution

The fourth proportional to 8,517.20, 11,755.80 and 5,684.72 is: 7,846.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,517.20 : 11,755.80 = 5,684.72 : x
  2. Step 2: Convert to fraction form
    8,517.20/11,755.80 = 5,684.72/x
  3. Step 3: Cross multiply
    8,517.20x = 11,755.80 × 5,684.72
  4. Step 4: Simplify right side
    8,517.20x = 66,828,431.38
  5. Step 5: Solve for x
    x = 66,828,431.38/8,517.20
  6. Step 6: Final answer
    x = 7,846.29

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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.