Home / 13,821.78-20,731.69-3,433.53

Finding the Fourth Proportional to 13,821.78, 20,731.69 and 3,433.53

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Solution

The fourth proportional to 13,821.78, 20,731.69 and 3,433.53 is: 5,150.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,821.78 : 20,731.69 = 3,433.53 : x
  2. Step 2: Convert to fraction form
    13,821.78/20,731.69 = 3,433.53/x
  3. Step 3: Cross multiply
    13,821.78x = 20,731.69 × 3,433.53
  4. Step 4: Simplify right side
    13,821.78x = 71,182,879.57
  5. Step 5: Solve for x
    x = 71,182,879.57/13,821.78
  6. Step 6: Final answer
    x = 5,150.05

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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.