Home / 8,122.15-12,185.70-3,439.72

Finding the Fourth Proportional to 8,122.15, 12,185.70 and 3,439.72

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Solution

The fourth proportional to 8,122.15, 12,185.70 and 3,439.72 is: 5,160.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,122.15 : 12,185.70 = 3,439.72 : x
  2. Step 2: Convert to fraction form
    8,122.15/12,185.70 = 3,439.72/x
  3. Step 3: Cross multiply
    8,122.15x = 12,185.70 × 3,439.72
  4. Step 4: Simplify right side
    8,122.15x = 41,915,396.00
  5. Step 5: Solve for x
    x = 41,915,396.00/8,122.15
  6. Step 6: Final answer
    x = 5,160.63

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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.