Home / 7,115.68-9,819.06-4,131.28

Finding the Fourth Proportional to 7,115.68, 9,819.06 and 4,131.28

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Solution

The fourth proportional to 7,115.68, 9,819.06 and 4,131.28 is: 5,700.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.68 : 9,819.06 = 4,131.28 : x
  2. Step 2: Convert to fraction form
    7,115.68/9,819.06 = 4,131.28/x
  3. Step 3: Cross multiply
    7,115.68x = 9,819.06 × 4,131.28
  4. Step 4: Simplify right side
    7,115.68x = 40,565,286.20
  5. Step 5: Solve for x
    x = 40,565,286.20/7,115.68
  6. Step 6: Final answer
    x = 5,700.83

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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.