Home / 12,879.32-19,320.24-4,112.12

Finding the Fourth Proportional to 12,879.32, 19,320.24 and 4,112.12

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Solution

The fourth proportional to 12,879.32, 19,320.24 and 4,112.12 is: 6,168.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.32 : 19,320.24 = 4,112.12 : x
  2. Step 2: Convert to fraction form
    12,879.32/19,320.24 = 4,112.12/x
  3. Step 3: Cross multiply
    12,879.32x = 19,320.24 × 4,112.12
  4. Step 4: Simplify right side
    12,879.32x = 79,447,145.31
  5. Step 5: Solve for x
    x = 79,447,145.31/12,879.32
  6. Step 6: Final answer
    x = 6,168.58

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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.