Home / 12,645.18-18,966.96-3,879.36

Finding the Fourth Proportional to 12,645.18, 18,966.96 and 3,879.36

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Solution

The fourth proportional to 12,645.18, 18,966.96 and 3,879.36 is: 5,818.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.18 : 18,966.96 = 3,879.36 : x
  2. Step 2: Convert to fraction form
    12,645.18/18,966.96 = 3,879.36/x
  3. Step 3: Cross multiply
    12,645.18x = 18,966.96 × 3,879.36
  4. Step 4: Simplify right side
    12,645.18x = 73,579,665.95
  5. Step 5: Solve for x
    x = 73,579,665.95/12,645.18
  6. Step 6: Final answer
    x = 5,818.79

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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.