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Finding the Fourth Proportional to 8,731.94, 12,067.18 and 7,759.94

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Solution

The fourth proportional to 8,731.94, 12,067.18 and 7,759.94 is: 10,723.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,731.94 : 12,067.18 = 7,759.94 : x
  2. Step 2: Convert to fraction form
    8,731.94/12,067.18 = 7,759.94/x
  3. Step 3: Cross multiply
    8,731.94x = 12,067.18 × 7,759.94
  4. Step 4: Simplify right side
    8,731.94x = 93,640,513.03
  5. Step 5: Solve for x
    x = 93,640,513.03/8,731.94
  6. Step 6: Final answer
    x = 10,723.91

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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.