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Finding the Fourth Proportional to 8,100.62, 12,067.20 and 7,855.80

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Solution

The fourth proportional to 8,100.62, 12,067.20 and 7,855.80 is: 11,702.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,100.62 : 12,067.20 = 7,855.80 : x
  2. Step 2: Convert to fraction form
    8,100.62/12,067.20 = 7,855.80/x
  3. Step 3: Cross multiply
    8,100.62x = 12,067.20 × 7,855.80
  4. Step 4: Simplify right side
    8,100.62x = 94,797,509.76
  5. Step 5: Solve for x
    x = 94,797,509.76/8,100.62
  6. Step 6: Final answer
    x = 11,702.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.