Home / 8,135.30-12,204.86-3,138.41

Finding the Fourth Proportional to 8,135.30, 12,204.86 and 3,138.41

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Solution

The fourth proportional to 8,135.30, 12,204.86 and 3,138.41 is: 4,708.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,135.30 : 12,204.86 = 3,138.41 : x
  2. Step 2: Convert to fraction form
    8,135.30/12,204.86 = 3,138.41/x
  3. Step 3: Cross multiply
    8,135.30x = 12,204.86 × 3,138.41
  4. Step 4: Simplify right side
    8,135.30x = 38,303,869.49
  5. Step 5: Solve for x
    x = 38,303,869.49/8,135.30
  6. Step 6: Final answer
    x = 4,708.35

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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.