Home / 5,179.48-7,147.70-2,821.60

Finding the Fourth Proportional to 5,179.48, 7,147.70 and 2,821.60

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Solution

The fourth proportional to 5,179.48, 7,147.70 and 2,821.60 is: 3,893.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.48 : 7,147.70 = 2,821.60 : x
  2. Step 2: Convert to fraction form
    5,179.48/7,147.70 = 2,821.60/x
  3. Step 3: Cross multiply
    5,179.48x = 7,147.70 × 2,821.60
  4. Step 4: Simplify right side
    5,179.48x = 20,167,950.32
  5. Step 5: Solve for x
    x = 20,167,950.32/5,179.48
  6. Step 6: Final answer
    x = 3,893.82

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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.