Home / 13,178.88-18,183.68-8,207.36

Finding the Fourth Proportional to 13,178.88, 18,183.68 and 8,207.36

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Solution

The fourth proportional to 13,178.88, 18,183.68 and 8,207.36 is: 11,324.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.88 : 18,183.68 = 8,207.36 : x
  2. Step 2: Convert to fraction form
    13,178.88/18,183.68 = 8,207.36/x
  3. Step 3: Cross multiply
    13,178.88x = 18,183.68 × 8,207.36
  4. Step 4: Simplify right side
    13,178.88x = 149,240,007.88
  5. Step 5: Solve for x
    x = 149,240,007.88/13,178.88
  6. Step 6: Final answer
    x = 11,324.18

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Half scale
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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.