Home / 5,179.09-7,147.15-2,821.23

Finding the Fourth Proportional to 5,179.09, 7,147.15 and 2,821.23

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Solution

The fourth proportional to 5,179.09, 7,147.15 and 2,821.23 is: 3,893.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.09 : 7,147.15 = 2,821.23 : x
  2. Step 2: Convert to fraction form
    5,179.09/7,147.15 = 2,821.23/x
  3. Step 3: Cross multiply
    5,179.09x = 7,147.15 × 2,821.23
  4. Step 4: Simplify right side
    5,179.09x = 20,163,781.68
  5. Step 5: Solve for x
    x = 20,163,781.68/5,179.09
  6. Step 6: Final answer
    x = 3,893.30

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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.