Home / 13,382.40-18,467.85-8,076.21

Finding the Fourth Proportional to 13,382.40, 18,467.85 and 8,076.21

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Solution

The fourth proportional to 13,382.40, 18,467.85 and 8,076.21 is: 11,145.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,382.40 : 18,467.85 = 8,076.21 : x
  2. Step 2: Convert to fraction form
    13,382.40/18,467.85 = 8,076.21/x
  3. Step 3: Cross multiply
    13,382.40x = 18,467.85 × 8,076.21
  4. Step 4: Simplify right side
    13,382.40x = 149,150,234.85
  5. Step 5: Solve for x
    x = 149,150,234.85/13,382.40
  6. Step 6: Final answer
    x = 11,145.25

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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.