Home / 2,251.42-3,109.10-2,128.70

Finding the Fourth Proportional to 2,251.42, 3,109.10 and 2,128.70

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Solution

The fourth proportional to 2,251.42, 3,109.10 and 2,128.70 is: 2,939.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,251.42 : 3,109.10 = 2,128.70 : x
  2. Step 2: Convert to fraction form
    2,251.42/3,109.10 = 2,128.70/x
  3. Step 3: Cross multiply
    2,251.42x = 3,109.10 × 2,128.70
  4. Step 4: Simplify right side
    2,251.42x = 6,618,338.30
  5. Step 5: Solve for x
    x = 6,618,338.30/2,251.42
  6. Step 6: Final answer
    x = 2,939.63

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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.