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Finding the Fourth Proportional to 6,863.77, 9,471.63 and 3,879.43

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Solution

The fourth proportional to 6,863.77, 9,471.63 and 3,879.43 is: 5,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,863.77 : 9,471.63 = 3,879.43 : x
  2. Step 2: Convert to fraction form
    6,863.77/9,471.63 = 3,879.43/x
  3. Step 3: Cross multiply
    6,863.77x = 9,471.63 × 3,879.43
  4. Step 4: Simplify right side
    6,863.77x = 36,744,496.46
  5. Step 5: Solve for x
    x = 36,744,496.46/6,863.77
  6. Step 6: Final answer
    x = 5,353.40

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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.