Home / 8,419.29-12,629.43-3,489.30

Finding the Fourth Proportional to 8,419.29, 12,629.43 and 3,489.30

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Solution

The fourth proportional to 8,419.29, 12,629.43 and 3,489.30 is: 5,234.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.29 : 12,629.43 = 3,489.30 : x
  2. Step 2: Convert to fraction form
    8,419.29/12,629.43 = 3,489.30/x
  3. Step 3: Cross multiply
    8,419.29x = 12,629.43 × 3,489.30
  4. Step 4: Simplify right side
    8,419.29x = 44,067,870.10
  5. Step 5: Solve for x
    x = 44,067,870.10/8,419.29
  6. Step 6: Final answer
    x = 5,234.16

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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.