Home / 5,179.60-7,147.90-2,821.74

Finding the Fourth Proportional to 5,179.60, 7,147.90 and 2,821.74

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Solution

The fourth proportional to 5,179.60, 7,147.90 and 2,821.74 is: 3,894.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.60 : 7,147.90 = 2,821.74 : x
  2. Step 2: Convert to fraction form
    5,179.60/7,147.90 = 2,821.74/x
  3. Step 3: Cross multiply
    5,179.60x = 7,147.90 × 2,821.74
  4. Step 4: Simplify right side
    5,179.60x = 20,169,476.20
  5. Step 5: Solve for x
    x = 20,169,476.20/5,179.60
  6. Step 6: Final answer
    x = 3,894.03

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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.