Home / 12,645.72-18,966.92-3,879.90

Finding the Fourth Proportional to 12,645.72, 18,966.92 and 3,879.90

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Solution

The fourth proportional to 12,645.72, 18,966.92 and 3,879.90 is: 5,819.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.72 : 18,966.92 = 3,879.90 : x
  2. Step 2: Convert to fraction form
    12,645.72/18,966.92 = 3,879.90/x
  3. Step 3: Cross multiply
    12,645.72x = 18,966.92 × 3,879.90
  4. Step 4: Simplify right side
    12,645.72x = 73,589,733.51
  5. Step 5: Solve for x
    x = 73,589,733.51/12,645.72
  6. Step 6: Final answer
    x = 5,819.34

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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.