Home / 20,782.99-31,183.62-10,919.98

Finding the Fourth Proportional to 20,782.99, 31,183.62 and 10,919.98

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Solution

The fourth proportional to 20,782.99, 31,183.62 and 10,919.98 is: 16,384.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.99 : 31,183.62 = 10,919.98 : x
  2. Step 2: Convert to fraction form
    20,782.99/31,183.62 = 10,919.98/x
  3. Step 3: Cross multiply
    20,782.99x = 31,183.62 × 10,919.98
  4. Step 4: Simplify right side
    20,782.99x = 340,524,506.73
  5. Step 5: Solve for x
    x = 340,524,506.73/20,782.99
  6. Step 6: Final answer
    x = 16,384.77

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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.