Home / 4,321.90-6,491.04-2,689.84

Finding the Fourth Proportional to 4,321.90, 6,491.04 and 2,689.84

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Solution

The fourth proportional to 4,321.90, 6,491.04 and 2,689.84 is: 4,039.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,321.90 : 6,491.04 = 2,689.84 : x
  2. Step 2: Convert to fraction form
    4,321.90/6,491.04 = 2,689.84/x
  3. Step 3: Cross multiply
    4,321.90x = 6,491.04 × 2,689.84
  4. Step 4: Simplify right side
    4,321.90x = 17,459,859.03
  5. Step 5: Solve for x
    x = 17,459,859.03/4,321.90
  6. Step 6: Final answer
    x = 4,039.86

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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.