Home / 12,179.98-18,270.57-3,415.78

Finding the Fourth Proportional to 12,179.98, 18,270.57 and 3,415.78

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Solution

The fourth proportional to 12,179.98, 18,270.57 and 3,415.78 is: 5,123.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.98 : 18,270.57 = 3,415.78 : x
  2. Step 2: Convert to fraction form
    12,179.98/18,270.57 = 3,415.78/x
  3. Step 3: Cross multiply
    12,179.98x = 18,270.57 × 3,415.78
  4. Step 4: Simplify right side
    12,179.98x = 62,408,247.59
  5. Step 5: Solve for x
    x = 62,408,247.59/12,179.98
  6. Step 6: Final answer
    x = 5,123.84

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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.