Home / 12,638.19-18,958.14-3,879.21

Finding the Fourth Proportional to 12,638.19, 18,958.14 and 3,879.21

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Solution

The fourth proportional to 12,638.19, 18,958.14 and 3,879.21 is: 5,819.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.19 : 18,958.14 = 3,879.21 : x
  2. Step 2: Convert to fraction form
    12,638.19/18,958.14 = 3,879.21/x
  3. Step 3: Cross multiply
    12,638.19x = 18,958.14 × 3,879.21
  4. Step 4: Simplify right side
    12,638.19x = 73,542,606.27
  5. Step 5: Solve for x
    x = 73,542,606.27/12,638.19
  6. Step 6: Final answer
    x = 5,819.08

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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.