Home / 12,939.75-19,408.41-4,174.74

Finding the Fourth Proportional to 12,939.75, 19,408.41 and 4,174.74

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Solution

The fourth proportional to 12,939.75, 19,408.41 and 4,174.74 is: 6,261.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.75 : 19,408.41 = 4,174.74 : x
  2. Step 2: Convert to fraction form
    12,939.75/19,408.41 = 4,174.74/x
  3. Step 3: Cross multiply
    12,939.75x = 19,408.41 × 4,174.74
  4. Step 4: Simplify right side
    12,939.75x = 81,025,065.56
  5. Step 5: Solve for x
    x = 81,025,065.56/12,939.75
  6. Step 6: Final answer
    x = 6,261.72

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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.