Home / 12,879.78-19,315.50-4,112.64

Finding the Fourth Proportional to 12,879.78, 19,315.50 and 4,112.64

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Solution

The fourth proportional to 12,879.78, 19,315.50 and 4,112.64 is: 6,167.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.78 : 19,315.50 = 4,112.64 : x
  2. Step 2: Convert to fraction form
    12,879.78/19,315.50 = 4,112.64/x
  3. Step 3: Cross multiply
    12,879.78x = 19,315.50 × 4,112.64
  4. Step 4: Simplify right side
    12,879.78x = 79,437,697.92
  5. Step 5: Solve for x
    x = 79,437,697.92/12,879.78
  6. Step 6: Final answer
    x = 6,167.63

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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.