Home / 5,179.27-7,147.47-2,821.45

Finding the Fourth Proportional to 5,179.27, 7,147.47 and 2,821.45

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Solution

The fourth proportional to 5,179.27, 7,147.47 and 2,821.45 is: 3,893.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.27 : 7,147.47 = 2,821.45 : x
  2. Step 2: Convert to fraction form
    5,179.27/7,147.47 = 2,821.45/x
  3. Step 3: Cross multiply
    5,179.27x = 7,147.47 × 2,821.45
  4. Step 4: Simplify right side
    5,179.27x = 20,166,229.23
  5. Step 5: Solve for x
    x = 20,166,229.23/5,179.27
  6. Step 6: Final answer
    x = 3,893.64

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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.