Home / 5,179.31-7,147.45-2,821.45

Finding the Fourth Proportional to 5,179.31, 7,147.45 and 2,821.45

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Solution

The fourth proportional to 5,179.31, 7,147.45 and 2,821.45 is: 3,893.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.31 : 7,147.45 = 2,821.45 : x
  2. Step 2: Convert to fraction form
    5,179.31/7,147.45 = 2,821.45/x
  3. Step 3: Cross multiply
    5,179.31x = 7,147.45 × 2,821.45
  4. Step 4: Simplify right side
    5,179.31x = 20,166,172.80
  5. Step 5: Solve for x
    x = 20,166,172.80/5,179.31
  6. Step 6: Final answer
    x = 3,893.60

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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.