Home / 8,146.92-12,220.98-3,990.42

Finding the Fourth Proportional to 8,146.92, 12,220.98 and 3,990.42

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Solution

The fourth proportional to 8,146.92, 12,220.98 and 3,990.42 is: 5,985.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,146.92 : 12,220.98 = 3,990.42 : x
  2. Step 2: Convert to fraction form
    8,146.92/12,220.98 = 3,990.42/x
  3. Step 3: Cross multiply
    8,146.92x = 12,220.98 × 3,990.42
  4. Step 4: Simplify right side
    8,146.92x = 48,766,843.01
  5. Step 5: Solve for x
    x = 48,766,843.01/8,146.92
  6. Step 6: Final answer
    x = 5,985.92

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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.