Home / 3,990.42-5,981.94-2,038.32

Finding the Fourth Proportional to 3,990.42, 5,981.94 and 2,038.32

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Solution

The fourth proportional to 3,990.42, 5,981.94 and 2,038.32 is: 3,055.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.42 : 5,981.94 = 2,038.32 : x
  2. Step 2: Convert to fraction form
    3,990.42/5,981.94 = 2,038.32/x
  3. Step 3: Cross multiply
    3,990.42x = 5,981.94 × 2,038.32
  4. Step 4: Simplify right side
    3,990.42x = 12,193,107.94
  5. Step 5: Solve for x
    x = 12,193,107.94/3,990.42
  6. Step 6: Final answer
    x = 3,055.60

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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.