Home / 8,138.39-12,207.68-2,591.70

Finding the Fourth Proportional to 8,138.39, 12,207.68 and 2,591.70

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Solution

The fourth proportional to 8,138.39, 12,207.68 and 2,591.70 is: 3,887.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.39 : 12,207.68 = 2,591.70 : x
  2. Step 2: Convert to fraction form
    8,138.39/12,207.68 = 2,591.70/x
  3. Step 3: Cross multiply
    8,138.39x = 12,207.68 × 2,591.70
  4. Step 4: Simplify right side
    8,138.39x = 31,638,631.30
  5. Step 5: Solve for x
    x = 31,638,631.30/8,138.39
  6. Step 6: Final answer
    x = 3,887.58

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1.5x scale

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.