Home / 8,639.91-11,906.42-6,278.31

Finding the Fourth Proportional to 8,639.91, 11,906.42 and 6,278.31

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Solution

The fourth proportional to 8,639.91, 11,906.42 and 6,278.31 is: 8,651.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.91 : 11,906.42 = 6,278.31 : x
  2. Step 2: Convert to fraction form
    8,639.91/11,906.42 = 6,278.31/x
  3. Step 3: Cross multiply
    8,639.91x = 11,906.42 × 6,278.31
  4. Step 4: Simplify right side
    8,639.91x = 74,752,136.22
  5. Step 5: Solve for x
    x = 74,752,136.22/8,639.91
  6. Step 6: Final answer
    x = 8,651.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.