Home / 7,231.28-9,979.34-4,087.48

Finding the Fourth Proportional to 7,231.28, 9,979.34 and 4,087.48

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Solution

The fourth proportional to 7,231.28, 9,979.34 and 4,087.48 is: 5,640.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,231.28 : 9,979.34 = 4,087.48 : x
  2. Step 2: Convert to fraction form
    7,231.28/9,979.34 = 4,087.48/x
  3. Step 3: Cross multiply
    7,231.28x = 9,979.34 × 4,087.48
  4. Step 4: Simplify right side
    7,231.28x = 40,790,352.66
  5. Step 5: Solve for x
    x = 40,790,352.66/7,231.28
  6. Step 6: Final answer
    x = 5,640.82

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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.