Home / 6,811.71-9,399.86-3,979.35

Finding the Fourth Proportional to 6,811.71, 9,399.86 and 3,979.35

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Solution

The fourth proportional to 6,811.71, 9,399.86 and 3,979.35 is: 5,491.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,811.71 : 9,399.86 = 3,979.35 : x
  2. Step 2: Convert to fraction form
    6,811.71/9,399.86 = 3,979.35/x
  3. Step 3: Cross multiply
    6,811.71x = 9,399.86 × 3,979.35
  4. Step 4: Simplify right side
    6,811.71x = 37,405,342.84
  5. Step 5: Solve for x
    x = 37,405,342.84/6,811.71
  6. Step 6: Final answer
    x = 5,491.33

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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.