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Finding the Fourth Proportional to 6,863.60, 9,471.78 and 3,719.77

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Solution

The fourth proportional to 6,863.60, 9,471.78 and 3,719.77 is: 5,133.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,863.60 : 9,471.78 = 3,719.77 : x
  2. Step 2: Convert to fraction form
    6,863.60/9,471.78 = 3,719.77/x
  3. Step 3: Cross multiply
    6,863.60x = 9,471.78 × 3,719.77
  4. Step 4: Simplify right side
    6,863.60x = 35,232,843.09
  5. Step 5: Solve for x
    x = 35,232,843.09/6,863.60
  6. Step 6: Final answer
    x = 5,133.29

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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.