Home / 8,186.60-12,280.20-2,640.02

Finding the Fourth Proportional to 8,186.60, 12,280.20 and 2,640.02

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Solution

The fourth proportional to 8,186.60, 12,280.20 and 2,640.02 is: 3,960.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,186.60 : 12,280.20 = 2,640.02 : x
  2. Step 2: Convert to fraction form
    8,186.60/12,280.20 = 2,640.02/x
  3. Step 3: Cross multiply
    8,186.60x = 12,280.20 × 2,640.02
  4. Step 4: Simplify right side
    8,186.60x = 32,419,971.38
  5. Step 5: Solve for x
    x = 32,419,971.38/8,186.60
  6. Step 6: Final answer
    x = 3,960.13

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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.