Home / 6,979.78-9,631.74-3,995.38

Finding the Fourth Proportional to 6,979.78, 9,631.74 and 3,995.38

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Solution

The fourth proportional to 6,979.78, 9,631.74 and 3,995.38 is: 5,513.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.78 : 9,631.74 = 3,995.38 : x
  2. Step 2: Convert to fraction form
    6,979.78/9,631.74 = 3,995.38/x
  3. Step 3: Cross multiply
    6,979.78x = 9,631.74 × 3,995.38
  4. Step 4: Simplify right side
    6,979.78x = 38,482,461.36
  5. Step 5: Solve for x
    x = 38,482,461.36/6,979.78
  6. Step 6: Final answer
    x = 5,513.42

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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.