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Finding the Fourth Proportional to 8,143.78, 12,194.52 and 6,981.22

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Solution

The fourth proportional to 8,143.78, 12,194.52 and 6,981.22 is: 10,453.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,143.78 : 12,194.52 = 6,981.22 : x
  2. Step 2: Convert to fraction form
    8,143.78/12,194.52 = 6,981.22/x
  3. Step 3: Cross multiply
    8,143.78x = 12,194.52 × 6,981.22
  4. Step 4: Simplify right side
    8,143.78x = 85,132,626.91
  5. Step 5: Solve for x
    x = 85,132,626.91/8,143.78
  6. Step 6: Final answer
    x = 10,453.70

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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.