Home / 6,811.52-9,398.90-3,979.15

Finding the Fourth Proportional to 6,811.52, 9,398.90 and 3,979.15

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Solution

The fourth proportional to 6,811.52, 9,398.90 and 3,979.15 is: 5,490.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,811.52 : 9,398.90 = 3,979.15 : x
  2. Step 2: Convert to fraction form
    6,811.52/9,398.90 = 3,979.15/x
  3. Step 3: Cross multiply
    6,811.52x = 9,398.90 × 3,979.15
  4. Step 4: Simplify right side
    6,811.52x = 37,399,619.39
  5. Step 5: Solve for x
    x = 37,399,619.39/6,811.52
  6. Step 6: Final answer
    x = 5,490.65

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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.