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Finding the Fourth Proportional to 8,143.44, 12,215.12 and 6,919.44

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Solution

The fourth proportional to 8,143.44, 12,215.12 and 6,919.44 is: 10,379.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,143.44 : 12,215.12 = 6,919.44 : x
  2. Step 2: Convert to fraction form
    8,143.44/12,215.12 = 6,919.44/x
  3. Step 3: Cross multiply
    8,143.44x = 12,215.12 × 6,919.44
  4. Step 4: Simplify right side
    8,143.44x = 84,521,789.93
  5. Step 5: Solve for x
    x = 84,521,789.93/8,143.44
  6. Step 6: Final answer
    x = 10,379.13

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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.