Home / 5,921.80-8,172.50-3,404.72

Finding the Fourth Proportional to 5,921.80, 8,172.50 and 3,404.72

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Solution

The fourth proportional to 5,921.80, 8,172.50 and 3,404.72 is: 4,698.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,921.80 : 8,172.50 = 3,404.72 : x
  2. Step 2: Convert to fraction form
    5,921.80/8,172.50 = 3,404.72/x
  3. Step 3: Cross multiply
    5,921.80x = 8,172.50 × 3,404.72
  4. Step 4: Simplify right side
    5,921.80x = 27,825,074.20
  5. Step 5: Solve for x
    x = 27,825,074.20/5,921.80
  6. Step 6: Final answer
    x = 4,698.75

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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.