Home / 8,438.31-12,659.22-2,890.35

Finding the Fourth Proportional to 8,438.31, 12,659.22 and 2,890.35

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Solution

The fourth proportional to 8,438.31, 12,659.22 and 2,890.35 is: 4,336.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.31 : 12,659.22 = 2,890.35 : x
  2. Step 2: Convert to fraction form
    8,438.31/12,659.22 = 2,890.35/x
  3. Step 3: Cross multiply
    8,438.31x = 12,659.22 × 2,890.35
  4. Step 4: Simplify right side
    8,438.31x = 36,589,576.53
  5. Step 5: Solve for x
    x = 36,589,576.53/8,438.31
  6. Step 6: Final answer
    x = 4,336.13

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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.