Home / 2,811.05-4,213.29-2,115.49

Finding the Fourth Proportional to 2,811.05, 4,213.29 and 2,115.49

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Solution

The fourth proportional to 2,811.05, 4,213.29 and 2,115.49 is: 3,170.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.05 : 4,213.29 = 2,115.49 : x
  2. Step 2: Convert to fraction form
    2,811.05/4,213.29 = 2,115.49/x
  3. Step 3: Cross multiply
    2,811.05x = 4,213.29 × 2,115.49
  4. Step 4: Simplify right side
    2,811.05x = 8,913,172.86
  5. Step 5: Solve for x
    x = 8,913,172.86/2,811.05
  6. Step 6: Final answer
    x = 3,170.76

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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.