Home / 4,879.45-6,731.78-2,990.42

Finding the Fourth Proportional to 4,879.45, 6,731.78 and 2,990.42

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Solution

The fourth proportional to 4,879.45, 6,731.78 and 2,990.42 is: 4,125.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.45 : 6,731.78 = 2,990.42 : x
  2. Step 2: Convert to fraction form
    4,879.45/6,731.78 = 2,990.42/x
  3. Step 3: Cross multiply
    4,879.45x = 6,731.78 × 2,990.42
  4. Step 4: Simplify right side
    4,879.45x = 20,130,800.94
  5. Step 5: Solve for x
    x = 20,130,800.94/4,879.45
  6. Step 6: Final answer
    x = 4,125.63

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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.