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Finding the Fourth Proportional to 7,896.88, 11,841.18 and 3,943.90

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Solution

The fourth proportional to 7,896.88, 11,841.18 and 3,943.90 is: 5,913.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,896.88 : 11,841.18 = 3,943.90 : x
  2. Step 2: Convert to fraction form
    7,896.88/11,841.18 = 3,943.90/x
  3. Step 3: Cross multiply
    7,896.88x = 11,841.18 × 3,943.90
  4. Step 4: Simplify right side
    7,896.88x = 46,700,429.80
  5. Step 5: Solve for x
    x = 46,700,429.80/7,896.88
  6. Step 6: Final answer
    x = 5,913.78

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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.