Home / 3,171.72-4,375.63-2,124.12

Finding the Fourth Proportional to 3,171.72, 4,375.63 and 2,124.12

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Solution

The fourth proportional to 3,171.72, 4,375.63 and 2,124.12 is: 2,930.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.72 : 4,375.63 = 2,124.12 : x
  2. Step 2: Convert to fraction form
    3,171.72/4,375.63 = 2,124.12/x
  3. Step 3: Cross multiply
    3,171.72x = 4,375.63 × 2,124.12
  4. Step 4: Simplify right side
    3,171.72x = 9,294,363.20
  5. Step 5: Solve for x
    x = 9,294,363.20/3,171.72
  6. Step 6: Final answer
    x = 2,930.39

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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.