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Finding the Fourth Proportional to 11,879.08, 17,813.43 and 5,640.88

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Solution

The fourth proportional to 11,879.08, 17,813.43 and 5,640.88 is: 8,458.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.08 : 17,813.43 = 5,640.88 : x
  2. Step 2: Convert to fraction form
    11,879.08/17,813.43 = 5,640.88/x
  3. Step 3: Cross multiply
    11,879.08x = 17,813.43 × 5,640.88
  4. Step 4: Simplify right side
    11,879.08x = 100,483,421.02
  5. Step 5: Solve for x
    x = 100,483,421.02/11,879.08
  6. Step 6: Final answer
    x = 8,458.86

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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.