Home / 6,979.40-9,631.41-3,995.90

Finding the Fourth Proportional to 6,979.40, 9,631.41 and 3,995.90

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Solution

The fourth proportional to 6,979.40, 9,631.41 and 3,995.90 is: 5,514.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.40 : 9,631.41 = 3,995.90 : x
  2. Step 2: Convert to fraction form
    6,979.40/9,631.41 = 3,995.90/x
  3. Step 3: Cross multiply
    6,979.40x = 9,631.41 × 3,995.90
  4. Step 4: Simplify right side
    6,979.40x = 38,486,151.22
  5. Step 5: Solve for x
    x = 38,486,151.22/6,979.40
  6. Step 6: Final answer
    x = 5,514.25

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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.