Home / 3,850.80-5,314.59-2,172.30

Finding the Fourth Proportional to 3,850.80, 5,314.59 and 2,172.30

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Solution

The fourth proportional to 3,850.80, 5,314.59 and 2,172.30 is: 2,998.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,850.80 : 5,314.59 = 2,172.30 : x
  2. Step 2: Convert to fraction form
    3,850.80/5,314.59 = 2,172.30/x
  3. Step 3: Cross multiply
    3,850.80x = 5,314.59 × 2,172.30
  4. Step 4: Simplify right side
    3,850.80x = 11,544,883.86
  5. Step 5: Solve for x
    x = 11,544,883.86/3,850.80
  6. Step 6: Final answer
    x = 2,998.05

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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.