Home / 13,709.22-20,511.99-12,879.78

Finding the Fourth Proportional to 13,709.22, 20,511.99 and 12,879.78

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Solution

The fourth proportional to 13,709.22, 20,511.99 and 12,879.78 is: 19,270.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.22 : 20,511.99 = 12,879.78 : x
  2. Step 2: Convert to fraction form
    13,709.22/20,511.99 = 12,879.78/x
  3. Step 3: Cross multiply
    13,709.22x = 20,511.99 × 12,879.78
  4. Step 4: Simplify right side
    13,709.22x = 264,189,918.56
  5. Step 5: Solve for x
    x = 264,189,918.56/13,709.22
  6. Step 6: Final answer
    x = 19,270.97

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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.