Home / 3,145.23-4,709.61-2,103.57

Finding the Fourth Proportional to 3,145.23, 4,709.61 and 2,103.57

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Solution

The fourth proportional to 3,145.23, 4,709.61 and 2,103.57 is: 3,149.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.23 : 4,709.61 = 2,103.57 : x
  2. Step 2: Convert to fraction form
    3,145.23/4,709.61 = 2,103.57/x
  3. Step 3: Cross multiply
    3,145.23x = 4,709.61 × 2,103.57
  4. Step 4: Simplify right side
    3,145.23x = 9,906,994.31
  5. Step 5: Solve for x
    x = 9,906,994.31/3,145.23
  6. Step 6: Final answer
    x = 3,149.85

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1.5x scale

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.