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Finding the Fourth Proportional to 6,979.99, 9,632.41 and 3,995.87

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Solution

The fourth proportional to 6,979.99, 9,632.41 and 3,995.87 is: 5,514.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.99 : 9,632.41 = 3,995.87 : x
  2. Step 2: Convert to fraction form
    6,979.99/9,632.41 = 3,995.87/x
  3. Step 3: Cross multiply
    6,979.99x = 9,632.41 × 3,995.87
  4. Step 4: Simplify right side
    6,979.99x = 38,489,858.15
  5. Step 5: Solve for x
    x = 38,489,858.15/6,979.99
  6. Step 6: Final answer
    x = 5,514.31

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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.