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Finding the Fourth Proportional to 5,092.88, 7,028.78 and 2,855.39

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Solution

The fourth proportional to 5,092.88, 7,028.78 and 2,855.39 is: 3,940.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,092.88 : 7,028.78 = 2,855.39 : x
  2. Step 2: Convert to fraction form
    5,092.88/7,028.78 = 2,855.39/x
  3. Step 3: Cross multiply
    5,092.88x = 7,028.78 × 2,855.39
  4. Step 4: Simplify right side
    5,092.88x = 20,069,858.70
  5. Step 5: Solve for x
    x = 20,069,858.70/5,092.88
  6. Step 6: Final answer
    x = 3,940.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.