Home / 3,021.26-4,172.20-2,857.64

Finding the Fourth Proportional to 3,021.26, 4,172.20 and 2,857.64

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Solution

The fourth proportional to 3,021.26, 4,172.20 and 2,857.64 is: 3,946.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,021.26 : 4,172.20 = 2,857.64 : x
  2. Step 2: Convert to fraction form
    3,021.26/4,172.20 = 2,857.64/x
  3. Step 3: Cross multiply
    3,021.26x = 4,172.20 × 2,857.64
  4. Step 4: Simplify right side
    3,021.26x = 11,922,645.61
  5. Step 5: Solve for x
    x = 11,922,645.61/3,021.26
  6. Step 6: Final answer
    x = 3,946.25

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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.