Home / 3,128.18-4,687.88-2,431.68

Finding the Fourth Proportional to 3,128.18, 4,687.88 and 2,431.68

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Solution

The fourth proportional to 3,128.18, 4,687.88 and 2,431.68 is: 3,644.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.18 : 4,687.88 = 2,431.68 : x
  2. Step 2: Convert to fraction form
    3,128.18/4,687.88 = 2,431.68/x
  3. Step 3: Cross multiply
    3,128.18x = 4,687.88 × 2,431.68
  4. Step 4: Simplify right side
    3,128.18x = 11,399,424.04
  5. Step 5: Solve for x
    x = 11,399,424.04/3,128.18
  6. Step 6: Final answer
    x = 3,644.11

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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.