Home / 3,121.57-4,678.42-2,730.64

Finding the Fourth Proportional to 3,121.57, 4,678.42 and 2,730.64

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Solution

The fourth proportional to 3,121.57, 4,678.42 and 2,730.64 is: 4,092.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.57 : 4,678.42 = 2,730.64 : x
  2. Step 2: Convert to fraction form
    3,121.57/4,678.42 = 2,730.64/x
  3. Step 3: Cross multiply
    3,121.57x = 4,678.42 × 2,730.64
  4. Step 4: Simplify right side
    3,121.57x = 12,775,080.79
  5. Step 5: Solve for x
    x = 12,775,080.79/3,121.57
  6. Step 6: Final answer
    x = 4,092.52

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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.