Home / 3,138.20-4,329.52-1,811.42

Finding the Fourth Proportional to 3,138.20, 4,329.52 and 1,811.42

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Solution

The fourth proportional to 3,138.20, 4,329.52 and 1,811.42 is: 2,499.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.20 : 4,329.52 = 1,811.42 : x
  2. Step 2: Convert to fraction form
    3,138.20/4,329.52 = 1,811.42/x
  3. Step 3: Cross multiply
    3,138.20x = 4,329.52 × 1,811.42
  4. Step 4: Simplify right side
    3,138.20x = 7,842,569.18
  5. Step 5: Solve for x
    x = 7,842,569.18/3,138.20
  6. Step 6: Final answer
    x = 2,499.07

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1.5x scale

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.