Home / 5,129.20-7,693.80-4,481.20

Finding the Fourth Proportional to 5,129.20, 7,693.80 and 4,481.20

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Solution

The fourth proportional to 5,129.20, 7,693.80 and 4,481.20 is: 6,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.20 : 7,693.80 = 4,481.20 : x
  2. Step 2: Convert to fraction form
    5,129.20/7,693.80 = 4,481.20/x
  3. Step 3: Cross multiply
    5,129.20x = 7,693.80 × 4,481.20
  4. Step 4: Simplify right side
    5,129.20x = 34,477,456.56
  5. Step 5: Solve for x
    x = 34,477,456.56/5,129.20
  6. Step 6: Final answer
    x = 6,721.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.