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Finding the Fourth Proportional to 8,092.80, 12,139.12 and 2,620.80

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Solution

The fourth proportional to 8,092.80, 12,139.12 and 2,620.80 is: 3,931.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,092.80 : 12,139.12 = 2,620.80 : x
  2. Step 2: Convert to fraction form
    8,092.80/12,139.12 = 2,620.80/x
  3. Step 3: Cross multiply
    8,092.80x = 12,139.12 × 2,620.80
  4. Step 4: Simplify right side
    8,092.80x = 31,814,205.70
  5. Step 5: Solve for x
    x = 31,814,205.70/8,092.80
  6. Step 6: Final answer
    x = 3,931.17

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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.