Home / 6,979.45-9,628.90-3,993.69

Finding the Fourth Proportional to 6,979.45, 9,628.90 and 3,993.69

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Solution

The fourth proportional to 6,979.45, 9,628.90 and 3,993.69 is: 5,509.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.45 : 9,628.90 = 3,993.69 : x
  2. Step 2: Convert to fraction form
    6,979.45/9,628.90 = 3,993.69/x
  3. Step 3: Cross multiply
    6,979.45x = 9,628.90 × 3,993.69
  4. Step 4: Simplify right side
    6,979.45x = 38,454,841.64
  5. Step 5: Solve for x
    x = 38,454,841.64/6,979.45
  6. Step 6: Final answer
    x = 5,509.72

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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.