Home / 8,143.26-12,211.20-3,209.10

Finding the Fourth Proportional to 8,143.26, 12,211.20 and 3,209.10

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Solution

The fourth proportional to 8,143.26, 12,211.20 and 3,209.10 is: 4,812.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,143.26 : 12,211.20 = 3,209.10 : x
  2. Step 2: Convert to fraction form
    8,143.26/12,211.20 = 3,209.10/x
  3. Step 3: Cross multiply
    8,143.26x = 12,211.20 × 3,209.10
  4. Step 4: Simplify right side
    8,143.26x = 39,186,961.92
  5. Step 5: Solve for x
    x = 39,186,961.92/8,143.26
  6. Step 6: Final answer
    x = 4,812.20

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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.