Home / 6,979.82-9,631.06-4,147.12

Finding the Fourth Proportional to 6,979.82, 9,631.06 and 4,147.12

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Solution

The fourth proportional to 6,979.82, 9,631.06 and 4,147.12 is: 5,722.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.82 : 9,631.06 = 4,147.12 : x
  2. Step 2: Convert to fraction form
    6,979.82/9,631.06 = 4,147.12/x
  3. Step 3: Cross multiply
    6,979.82x = 9,631.06 × 4,147.12
  4. Step 4: Simplify right side
    6,979.82x = 39,941,113.39
  5. Step 5: Solve for x
    x = 39,941,113.39/6,979.82
  6. Step 6: Final answer
    x = 5,722.37

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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.