Home / 8,138.28-12,206.80-2,591.80

Finding the Fourth Proportional to 8,138.28, 12,206.80 and 2,591.80

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Solution

The fourth proportional to 8,138.28, 12,206.80 and 2,591.80 is: 3,887.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.28 : 12,206.80 = 2,591.80 : x
  2. Step 2: Convert to fraction form
    8,138.28/12,206.80 = 2,591.80/x
  3. Step 3: Cross multiply
    8,138.28x = 12,206.80 × 2,591.80
  4. Step 4: Simplify right side
    8,138.28x = 31,637,584.24
  5. Step 5: Solve for x
    x = 31,637,584.24/8,138.28
  6. Step 6: Final answer
    x = 3,887.50

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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.