Home / 5,198.40-7,787.43-3,120.15

Finding the Fourth Proportional to 5,198.40, 7,787.43 and 3,120.15

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Solution

The fourth proportional to 5,198.40, 7,787.43 and 3,120.15 is: 4,674.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,198.40 : 7,787.43 = 3,120.15 : x
  2. Step 2: Convert to fraction form
    5,198.40/7,787.43 = 3,120.15/x
  3. Step 3: Cross multiply
    5,198.40x = 7,787.43 × 3,120.15
  4. Step 4: Simplify right side
    5,198.40x = 24,297,949.71
  5. Step 5: Solve for x
    x = 24,297,949.71/5,198.40
  6. Step 6: Final answer
    x = 4,674.12

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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.