Home / 3,851.45-5,314.99-2,172.85

Finding the Fourth Proportional to 3,851.45, 5,314.99 and 2,172.85

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Solution

The fourth proportional to 3,851.45, 5,314.99 and 2,172.85 is: 2,998.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.45 : 5,314.99 = 2,172.85 : x
  2. Step 2: Convert to fraction form
    3,851.45/5,314.99 = 2,172.85/x
  3. Step 3: Cross multiply
    3,851.45x = 5,314.99 × 2,172.85
  4. Step 4: Simplify right side
    3,851.45x = 11,548,676.02
  5. Step 5: Solve for x
    x = 11,548,676.02/3,851.45
  6. Step 6: Final answer
    x = 2,998.53

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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.