Home / 7,990.62-11,975.13-4,086.78

Finding the Fourth Proportional to 7,990.62, 11,975.13 and 4,086.78

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Solution

The fourth proportional to 7,990.62, 11,975.13 and 4,086.78 is: 6,124.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.62 : 11,975.13 = 4,086.78 : x
  2. Step 2: Convert to fraction form
    7,990.62/11,975.13 = 4,086.78/x
  3. Step 3: Cross multiply
    7,990.62x = 11,975.13 × 4,086.78
  4. Step 4: Simplify right side
    7,990.62x = 48,939,721.78
  5. Step 5: Solve for x
    x = 48,939,721.78/7,990.62
  6. Step 6: Final answer
    x = 6,124.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.