Home / 2,156.20-3,234.26-1,115.86

Finding the Fourth Proportional to 2,156.20, 3,234.26 and 1,115.86

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Solution

The fourth proportional to 2,156.20, 3,234.26 and 1,115.86 is: 1,673.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.20 : 3,234.26 = 1,115.86 : x
  2. Step 2: Convert to fraction form
    2,156.20/3,234.26 = 1,115.86/x
  3. Step 3: Cross multiply
    2,156.20x = 3,234.26 × 1,115.86
  4. Step 4: Simplify right side
    2,156.20x = 3,608,981.36
  5. Step 5: Solve for x
    x = 3,608,981.36/2,156.20
  6. Step 6: Final answer
    x = 1,673.77

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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.