Home / 13,218.31-18,244.70-8,179.60

Finding the Fourth Proportional to 13,218.31, 18,244.70 and 8,179.60

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Solution

The fourth proportional to 13,218.31, 18,244.70 and 8,179.60 is: 11,289.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.31 : 18,244.70 = 8,179.60 : x
  2. Step 2: Convert to fraction form
    13,218.31/18,244.70 = 8,179.60/x
  3. Step 3: Cross multiply
    13,218.31x = 18,244.70 × 8,179.60
  4. Step 4: Simplify right side
    13,218.31x = 149,234,348.12
  5. Step 5: Solve for x
    x = 149,234,348.12/13,218.31
  6. Step 6: Final answer
    x = 11,289.97

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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.