Home / 12,661.20-19,002.60-10,198.80

Finding the Fourth Proportional to 12,661.20, 19,002.60 and 10,198.80

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Solution

The fourth proportional to 12,661.20, 19,002.60 and 10,198.80 is: 15,306.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.20 : 19,002.60 = 10,198.80 : x
  2. Step 2: Convert to fraction form
    12,661.20/19,002.60 = 10,198.80/x
  3. Step 3: Cross multiply
    12,661.20x = 19,002.60 × 10,198.80
  4. Step 4: Simplify right side
    12,661.20x = 193,803,716.88
  5. Step 5: Solve for x
    x = 193,803,716.88/12,661.20
  6. Step 6: Final answer
    x = 15,306.90

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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.