Home / 5,179.06-7,147.14-2,821.20

Finding the Fourth Proportional to 5,179.06, 7,147.14 and 2,821.20

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Solution

The fourth proportional to 5,179.06, 7,147.14 and 2,821.20 is: 3,893.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.06 : 7,147.14 = 2,821.20 : x
  2. Step 2: Convert to fraction form
    5,179.06/7,147.14 = 2,821.20/x
  3. Step 3: Cross multiply
    5,179.06x = 7,147.14 × 2,821.20
  4. Step 4: Simplify right side
    5,179.06x = 20,163,511.37
  5. Step 5: Solve for x
    x = 20,163,511.37/5,179.06
  6. Step 6: Final answer
    x = 3,893.28

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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.