Home / 3,989.11-5,973.21-2,812.74

Finding the Fourth Proportional to 3,989.11, 5,973.21 and 2,812.74

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Solution

The fourth proportional to 3,989.11, 5,973.21 and 2,812.74 is: 4,211.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.11 : 5,973.21 = 2,812.74 : x
  2. Step 2: Convert to fraction form
    3,989.11/5,973.21 = 2,812.74/x
  3. Step 3: Cross multiply
    3,989.11x = 5,973.21 × 2,812.74
  4. Step 4: Simplify right side
    3,989.11x = 16,801,097.90
  5. Step 5: Solve for x
    x = 16,801,097.90/3,989.11
  6. Step 6: Final answer
    x = 4,211.74

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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.