Home / 8,139.26-12,198.11-4,190.36

Finding the Fourth Proportional to 8,139.26, 12,198.11 and 4,190.36

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Solution

The fourth proportional to 8,139.26, 12,198.11 and 4,190.36 is: 6,279.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.26 : 12,198.11 = 4,190.36 : x
  2. Step 2: Convert to fraction form
    8,139.26/12,198.11 = 4,190.36/x
  3. Step 3: Cross multiply
    8,139.26x = 12,198.11 × 4,190.36
  4. Step 4: Simplify right side
    8,139.26x = 51,114,482.46
  5. Step 5: Solve for x
    x = 51,114,482.46/8,139.26
  6. Step 6: Final answer
    x = 6,279.99

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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.