Home / 3,105.60-4,658.40-2,121.45

Finding the Fourth Proportional to 3,105.60, 4,658.40 and 2,121.45

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Solution

The fourth proportional to 3,105.60, 4,658.40 and 2,121.45 is: 3,182.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.60 : 4,658.40 = 2,121.45 : x
  2. Step 2: Convert to fraction form
    3,105.60/4,658.40 = 2,121.45/x
  3. Step 3: Cross multiply
    3,105.60x = 4,658.40 × 2,121.45
  4. Step 4: Simplify right side
    3,105.60x = 9,882,562.68
  5. Step 5: Solve for x
    x = 9,882,562.68/3,105.60
  6. Step 6: Final answer
    x = 3,182.18

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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.