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Finding the Fourth Proportional to 26,409.72, 39,620.05 and 8,879.09

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Solution

The fourth proportional to 26,409.72, 39,620.05 and 8,879.09 is: 13,320.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,409.72 : 39,620.05 = 8,879.09 : x
  2. Step 2: Convert to fraction form
    26,409.72/39,620.05 = 8,879.09/x
  3. Step 3: Cross multiply
    26,409.72x = 39,620.05 × 8,879.09
  4. Step 4: Simplify right side
    26,409.72x = 351,789,989.75
  5. Step 5: Solve for x
    x = 351,789,989.75/26,409.72
  6. Step 6: Final answer
    x = 13,320.47

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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.