Home / 5,790.36-8,680.38-2,091.78

Finding the Fourth Proportional to 5,790.36, 8,680.38 and 2,091.78

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Solution

The fourth proportional to 5,790.36, 8,680.38 and 2,091.78 is: 3,135.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,790.36 : 8,680.38 = 2,091.78 : x
  2. Step 2: Convert to fraction form
    5,790.36/8,680.38 = 2,091.78/x
  3. Step 3: Cross multiply
    5,790.36x = 8,680.38 × 2,091.78
  4. Step 4: Simplify right side
    5,790.36x = 18,157,445.28
  5. Step 5: Solve for x
    x = 18,157,445.28/5,790.36
  6. Step 6: Final answer
    x = 3,135.81

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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.