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Finding the Fourth Proportional to 11,855.57, 17,789.42 and 5,286.06

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Solution

The fourth proportional to 11,855.57, 17,789.42 and 5,286.06 is: 7,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,855.57 : 17,789.42 = 5,286.06 : x
  2. Step 2: Convert to fraction form
    11,855.57/17,789.42 = 5,286.06/x
  3. Step 3: Cross multiply
    11,855.57x = 17,789.42 × 5,286.06
  4. Step 4: Simplify right side
    11,855.57x = 94,035,954.70
  5. Step 5: Solve for x
    x = 94,035,954.70/11,855.57
  6. Step 6: Final answer
    x = 7,931.80

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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.