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Finding the Fourth Proportional to 8,375.31, 12,561.84 and 2,828.61

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Solution

The fourth proportional to 8,375.31, 12,561.84 and 2,828.61 is: 4,242.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,375.31 : 12,561.84 = 2,828.61 : x
  2. Step 2: Convert to fraction form
    8,375.31/12,561.84 = 2,828.61/x
  3. Step 3: Cross multiply
    8,375.31x = 12,561.84 × 2,828.61
  4. Step 4: Simplify right side
    8,375.31x = 35,532,546.24
  5. Step 5: Solve for x
    x = 35,532,546.24/8,375.31
  6. Step 6: Final answer
    x = 4,242.54

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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.