Home / 3,174.60-4,382.64-2,128.44

Finding the Fourth Proportional to 3,174.60, 4,382.64 and 2,128.44

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Solution

The fourth proportional to 3,174.60, 4,382.64 and 2,128.44 is: 2,938.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,174.60 : 4,382.64 = 2,128.44 : x
  2. Step 2: Convert to fraction form
    3,174.60/4,382.64 = 2,128.44/x
  3. Step 3: Cross multiply
    3,174.60x = 4,382.64 × 2,128.44
  4. Step 4: Simplify right side
    3,174.60x = 9,328,186.28
  5. Step 5: Solve for x
    x = 9,328,186.28/3,174.60
  6. Step 6: Final answer
    x = 2,938.38

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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.