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Finding the Fourth Proportional to 5,679.87, 7,837.40 and 3,321.56

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Solution

The fourth proportional to 5,679.87, 7,837.40 and 3,321.56 is: 4,583.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.87 : 7,837.40 = 3,321.56 : x
  2. Step 2: Convert to fraction form
    5,679.87/7,837.40 = 3,321.56/x
  3. Step 3: Cross multiply
    5,679.87x = 7,837.40 × 3,321.56
  4. Step 4: Simplify right side
    5,679.87x = 26,032,338.55
  5. Step 5: Solve for x
    x = 26,032,338.55/5,679.87
  6. Step 6: Final answer
    x = 4,583.26

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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.