Home / 12,415.24-18,620.32-3,647.80

Finding the Fourth Proportional to 12,415.24, 18,620.32 and 3,647.80

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Solution

The fourth proportional to 12,415.24, 18,620.32 and 3,647.80 is: 5,470.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.24 : 18,620.32 = 3,647.80 : x
  2. Step 2: Convert to fraction form
    12,415.24/18,620.32 = 3,647.80/x
  3. Step 3: Cross multiply
    12,415.24x = 18,620.32 × 3,647.80
  4. Step 4: Simplify right side
    12,415.24x = 67,923,203.30
  5. Step 5: Solve for x
    x = 67,923,203.30/12,415.24
  6. Step 6: Final answer
    x = 5,470.95

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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.