Home / 11,280.75-16,920.78-5,361.90

Finding the Fourth Proportional to 11,280.75, 16,920.78 and 5,361.90

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Solution

The fourth proportional to 11,280.75, 16,920.78 and 5,361.90 is: 8,042.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280.75 : 16,920.78 = 5,361.90 : x
  2. Step 2: Convert to fraction form
    11,280.75/16,920.78 = 5,361.90/x
  3. Step 3: Cross multiply
    11,280.75x = 16,920.78 × 5,361.90
  4. Step 4: Simplify right side
    11,280.75x = 90,727,530.28
  5. Step 5: Solve for x
    x = 90,727,530.28/11,280.75
  6. Step 6: Final answer
    x = 8,042.69

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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.