Home / 3,120.36-4,306.96-1,940.74

Finding the Fourth Proportional to 3,120.36, 4,306.96 and 1,940.74

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Solution

The fourth proportional to 3,120.36, 4,306.96 and 1,940.74 is: 2,678.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.36 : 4,306.96 = 1,940.74 : x
  2. Step 2: Convert to fraction form
    3,120.36/4,306.96 = 1,940.74/x
  3. Step 3: Cross multiply
    3,120.36x = 4,306.96 × 1,940.74
  4. Step 4: Simplify right side
    3,120.36x = 8,358,689.55
  5. Step 5: Solve for x
    x = 8,358,689.55/3,120.36
  6. Step 6: Final answer
    x = 2,678.76

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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.