Home / 8,129.82-12,188.84-5,490.78

Finding the Fourth Proportional to 8,129.82, 12,188.84 and 5,490.78

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Solution

The fourth proportional to 8,129.82, 12,188.84 and 5,490.78 is: 8,232.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.82 : 12,188.84 = 5,490.78 : x
  2. Step 2: Convert to fraction form
    8,129.82/12,188.84 = 5,490.78/x
  3. Step 3: Cross multiply
    8,129.82x = 12,188.84 × 5,490.78
  4. Step 4: Simplify right side
    8,129.82x = 66,926,238.90
  5. Step 5: Solve for x
    x = 66,926,238.90/8,129.82
  6. Step 6: Final answer
    x = 8,232.19

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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.