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Finding the Fourth Proportional to 6,322.13, 8,724.40 and 3,489.40

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Solution

The fourth proportional to 6,322.13, 8,724.40 and 3,489.40 is: 4,815.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,322.13 : 8,724.40 = 3,489.40 : x
  2. Step 2: Convert to fraction form
    6,322.13/8,724.40 = 3,489.40/x
  3. Step 3: Cross multiply
    6,322.13x = 8,724.40 × 3,489.40
  4. Step 4: Simplify right side
    6,322.13x = 30,442,890.83
  5. Step 5: Solve for x
    x = 30,442,890.83/6,322.13
  6. Step 6: Final answer
    x = 4,815.29

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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.