Home / 5,179.80-7,148.04-2,821.89

Finding the Fourth Proportional to 5,179.80, 7,148.04 and 2,821.89

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Solution

The fourth proportional to 5,179.80, 7,148.04 and 2,821.89 is: 3,894.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.80 : 7,148.04 = 2,821.89 : x
  2. Step 2: Convert to fraction form
    5,179.80/7,148.04 = 2,821.89/x
  3. Step 3: Cross multiply
    5,179.80x = 7,148.04 × 2,821.89
  4. Step 4: Simplify right side
    5,179.80x = 20,170,982.60
  5. Step 5: Solve for x
    x = 20,170,982.60/5,179.80
  6. Step 6: Final answer
    x = 3,894.16

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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.