Home / 7,231.20-9,979.20-4,087.36

Finding the Fourth Proportional to 7,231.20, 9,979.20 and 4,087.36

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Solution

The fourth proportional to 7,231.20, 9,979.20 and 4,087.36 is: 5,640.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,231.20 : 9,979.20 = 4,087.36 : x
  2. Step 2: Convert to fraction form
    7,231.20/9,979.20 = 4,087.36/x
  3. Step 3: Cross multiply
    7,231.20x = 9,979.20 × 4,087.36
  4. Step 4: Simplify right side
    7,231.20x = 40,788,582.91
  5. Step 5: Solve for x
    x = 40,788,582.91/7,231.20
  6. Step 6: Final answer
    x = 5,640.64

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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.