Home / 13,600.80-20,401.44-5,279.92

Finding the Fourth Proportional to 13,600.80, 20,401.44 and 5,279.92

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Solution

The fourth proportional to 13,600.80, 20,401.44 and 5,279.92 is: 7,919.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,600.80 : 20,401.44 = 5,279.92 : x
  2. Step 2: Convert to fraction form
    13,600.80/20,401.44 = 5,279.92/x
  3. Step 3: Cross multiply
    13,600.80x = 20,401.44 × 5,279.92
  4. Step 4: Simplify right side
    13,600.80x = 107,717,971.08
  5. Step 5: Solve for x
    x = 107,717,971.08/13,600.80
  6. Step 6: Final answer
    x = 7,919.97

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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.