Home / 12,986.21-19,481.37-4,219.08

Finding the Fourth Proportional to 12,986.21, 19,481.37 and 4,219.08

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Solution

The fourth proportional to 12,986.21, 19,481.37 and 4,219.08 is: 6,329.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.21 : 19,481.37 = 4,219.08 : x
  2. Step 2: Convert to fraction form
    12,986.21/19,481.37 = 4,219.08/x
  3. Step 3: Cross multiply
    12,986.21x = 19,481.37 × 4,219.08
  4. Step 4: Simplify right side
    12,986.21x = 82,193,458.54
  5. Step 5: Solve for x
    x = 82,193,458.54/12,986.21
  6. Step 6: Final answer
    x = 6,329.29

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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.