Home / 5,179.12-7,147.16-2,821.22

Finding the Fourth Proportional to 5,179.12, 7,147.16 and 2,821.22

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Solution

The fourth proportional to 5,179.12, 7,147.16 and 2,821.22 is: 3,893.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.12 : 7,147.16 = 2,821.22 : x
  2. Step 2: Convert to fraction form
    5,179.12/7,147.16 = 2,821.22/x
  3. Step 3: Cross multiply
    5,179.12x = 7,147.16 × 2,821.22
  4. Step 4: Simplify right side
    5,179.12x = 20,163,710.74
  5. Step 5: Solve for x
    x = 20,163,710.74/5,179.12
  6. Step 6: Final answer
    x = 3,893.27

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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.