Home / 3,934.85-5,429.30-2,990.39

Finding the Fourth Proportional to 3,934.85, 5,429.30 and 2,990.39

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Solution

The fourth proportional to 3,934.85, 5,429.30 and 2,990.39 is: 4,126.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.85 : 5,429.30 = 2,990.39 : x
  2. Step 2: Convert to fraction form
    3,934.85/5,429.30 = 2,990.39/x
  3. Step 3: Cross multiply
    3,934.85x = 5,429.30 × 2,990.39
  4. Step 4: Simplify right side
    3,934.85x = 16,235,682.33
  5. Step 5: Solve for x
    x = 16,235,682.33/3,934.85
  6. Step 6: Final answer
    x = 4,126.13

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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.