Home / 3,851.58-5,314.86-2,172.90

Finding the Fourth Proportional to 3,851.58, 5,314.86 and 2,172.90

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Solution

The fourth proportional to 3,851.58, 5,314.86 and 2,172.90 is: 2,998.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.58 : 5,314.86 = 2,172.90 : x
  2. Step 2: Convert to fraction form
    3,851.58/5,314.86 = 2,172.90/x
  3. Step 3: Cross multiply
    3,851.58x = 5,314.86 × 2,172.90
  4. Step 4: Simplify right side
    3,851.58x = 11,548,659.29
  5. Step 5: Solve for x
    x = 11,548,659.29/3,851.58
  6. Step 6: Final answer
    x = 2,998.42

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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.