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Finding the Fourth Proportional to 8,557.75, 12,815.66 and 7,067.86

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Solution

The fourth proportional to 8,557.75, 12,815.66 and 7,067.86 is: 10,584.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.75 : 12,815.66 = 7,067.86 : x
  2. Step 2: Convert to fraction form
    8,557.75/12,815.66 = 7,067.86/x
  3. Step 3: Cross multiply
    8,557.75x = 12,815.66 × 7,067.86
  4. Step 4: Simplify right side
    8,557.75x = 90,579,225.78
  5. Step 5: Solve for x
    x = 90,579,225.78/8,557.75
  6. Step 6: Final answer
    x = 10,584.47

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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.