Home / 3,405.12-5,109.24-2,021.20

Finding the Fourth Proportional to 3,405.12, 5,109.24 and 2,021.20

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Solution

The fourth proportional to 3,405.12, 5,109.24 and 2,021.20 is: 3,032.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.12 : 5,109.24 = 2,021.20 : x
  2. Step 2: Convert to fraction form
    3,405.12/5,109.24 = 2,021.20/x
  3. Step 3: Cross multiply
    3,405.12x = 5,109.24 × 2,021.20
  4. Step 4: Simplify right side
    3,405.12x = 10,326,795.89
  5. Step 5: Solve for x
    x = 10,326,795.89/3,405.12
  6. Step 6: Final answer
    x = 3,032.73

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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.