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Finding the Fourth Proportional to 13,659.86, 20,494.92 and 7,081.94

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Solution

The fourth proportional to 13,659.86, 20,494.92 and 7,081.94 is: 10,625.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.86 : 20,494.92 = 7,081.94 : x
  2. Step 2: Convert to fraction form
    13,659.86/20,494.92 = 7,081.94/x
  3. Step 3: Cross multiply
    13,659.86x = 20,494.92 × 7,081.94
  4. Step 4: Simplify right side
    13,659.86x = 145,143,793.74
  5. Step 5: Solve for x
    x = 145,143,793.74/13,659.86
  6. Step 6: Final answer
    x = 10,625.57

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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.