Home / 6,431.28-8,874.21-3,779.54

Finding the Fourth Proportional to 6,431.28, 8,874.21 and 3,779.54

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Solution

The fourth proportional to 6,431.28, 8,874.21 and 3,779.54 is: 5,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.28 : 8,874.21 = 3,779.54 : x
  2. Step 2: Convert to fraction form
    6,431.28/8,874.21 = 3,779.54/x
  3. Step 3: Cross multiply
    6,431.28x = 8,874.21 × 3,779.54
  4. Step 4: Simplify right side
    6,431.28x = 33,540,431.66
  5. Step 5: Solve for x
    x = 33,540,431.66/6,431.28
  6. Step 6: Final answer
    x = 5,215.20

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1.5x scale

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.