Home / 3,990.42-5,974.29-2,689.56

Finding the Fourth Proportional to 3,990.42, 5,974.29 and 2,689.56

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Solution

The fourth proportional to 3,990.42, 5,974.29 and 2,689.56 is: 4,026.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.42 : 5,974.29 = 2,689.56 : x
  2. Step 2: Convert to fraction form
    3,990.42/5,974.29 = 2,689.56/x
  3. Step 3: Cross multiply
    3,990.42x = 5,974.29 × 2,689.56
  4. Step 4: Simplify right side
    3,990.42x = 16,068,211.41
  5. Step 5: Solve for x
    x = 16,068,211.41/3,990.42
  6. Step 6: Final answer
    x = 4,026.70

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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.