Home / 13,181.31-18,189.66-7,879.05

Finding the Fourth Proportional to 13,181.31, 18,189.66 and 7,879.05

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Solution

The fourth proportional to 13,181.31, 18,189.66 and 7,879.05 is: 10,872.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.31 : 18,189.66 = 7,879.05 : x
  2. Step 2: Convert to fraction form
    13,181.31/18,189.66 = 7,879.05/x
  3. Step 3: Cross multiply
    13,181.31x = 18,189.66 × 7,879.05
  4. Step 4: Simplify right side
    13,181.31x = 143,317,240.62
  5. Step 5: Solve for x
    x = 143,317,240.62/13,181.31
  6. Step 6: Final answer
    x = 10,872.76

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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.