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Finding the Fourth Proportional to 6,863.61, 9,471.80 and 3,719.79

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Solution

The fourth proportional to 6,863.61, 9,471.80 and 3,719.79 is: 5,133.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,863.61 : 9,471.80 = 3,719.79 : x
  2. Step 2: Convert to fraction form
    6,863.61/9,471.80 = 3,719.79/x
  3. Step 3: Cross multiply
    6,863.61x = 9,471.80 × 3,719.79
  4. Step 4: Simplify right side
    6,863.61x = 35,233,106.92
  5. Step 5: Solve for x
    x = 35,233,106.92/6,863.61
  6. Step 6: Final answer
    x = 5,133.32

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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.