Home / 14,911.78-20,578.30-8,198.09

Finding the Fourth Proportional to 14,911.78, 20,578.30 and 8,198.09

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Solution

The fourth proportional to 14,911.78, 20,578.30 and 8,198.09 is: 11,313.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,911.78 : 20,578.30 = 8,198.09 : x
  2. Step 2: Convert to fraction form
    14,911.78/20,578.30 = 8,198.09/x
  3. Step 3: Cross multiply
    14,911.78x = 20,578.30 × 8,198.09
  4. Step 4: Simplify right side
    14,911.78x = 168,702,786.40
  5. Step 5: Solve for x
    x = 168,702,786.40/14,911.78
  6. Step 6: Final answer
    x = 11,313.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.