Home / 3,138.27-4,329.58-1,811.72

Finding the Fourth Proportional to 3,138.27, 4,329.58 and 1,811.72

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Solution

The fourth proportional to 3,138.27, 4,329.58 and 1,811.72 is: 2,499.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.27 : 4,329.58 = 1,811.72 : x
  2. Step 2: Convert to fraction form
    3,138.27/4,329.58 = 1,811.72/x
  3. Step 3: Cross multiply
    3,138.27x = 4,329.58 × 1,811.72
  4. Step 4: Simplify right side
    3,138.27x = 7,843,966.92
  5. Step 5: Solve for x
    x = 7,843,966.92/3,138.27
  6. Step 6: Final answer
    x = 2,499.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.