Home / 12,879.40-19,317.56-3,392.68

Finding the Fourth Proportional to 12,879.40, 19,317.56 and 3,392.68

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Solution

The fourth proportional to 12,879.40, 19,317.56 and 3,392.68 is: 5,088.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.40 : 19,317.56 = 3,392.68 : x
  2. Step 2: Convert to fraction form
    12,879.40/19,317.56 = 3,392.68/x
  3. Step 3: Cross multiply
    12,879.40x = 19,317.56 × 3,392.68
  4. Step 4: Simplify right side
    12,879.40x = 65,538,202.87
  5. Step 5: Solve for x
    x = 65,538,202.87/12,879.40
  6. Step 6: Final answer
    x = 5,088.61

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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.