Home / 8,140.92-11,224.62-6,879.75

Finding the Fourth Proportional to 8,140.92, 11,224.62 and 6,879.75

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Solution

The fourth proportional to 8,140.92, 11,224.62 and 6,879.75 is: 9,485.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,140.92 : 11,224.62 = 6,879.75 : x
  2. Step 2: Convert to fraction form
    8,140.92/11,224.62 = 6,879.75/x
  3. Step 3: Cross multiply
    8,140.92x = 11,224.62 × 6,879.75
  4. Step 4: Simplify right side
    8,140.92x = 77,222,579.45
  5. Step 5: Solve for x
    x = 77,222,579.45/8,140.92
  6. Step 6: Final answer
    x = 9,485.73

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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.