Home / 13,251.20-19,879.20-6,660.80

Finding the Fourth Proportional to 13,251.20, 19,879.20 and 6,660.80

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Solution

The fourth proportional to 13,251.20, 19,879.20 and 6,660.80 is: 9,992.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.20 : 19,879.20 = 6,660.80 : x
  2. Step 2: Convert to fraction form
    13,251.20/19,879.20 = 6,660.80/x
  3. Step 3: Cross multiply
    13,251.20x = 19,879.20 × 6,660.80
  4. Step 4: Simplify right side
    13,251.20x = 132,411,375.36
  5. Step 5: Solve for x
    x = 132,411,375.36/13,251.20
  6. Step 6: Final answer
    x = 9,992.41

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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.