Home / 12,990.54-19,487.86-4,223.41

Finding the Fourth Proportional to 12,990.54, 19,487.86 and 4,223.41

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Solution

The fourth proportional to 12,990.54, 19,487.86 and 4,223.41 is: 6,335.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.54 : 19,487.86 = 4,223.41 : x
  2. Step 2: Convert to fraction form
    12,990.54/19,487.86 = 4,223.41/x
  3. Step 3: Cross multiply
    12,990.54x = 19,487.86 × 4,223.41
  4. Step 4: Simplify right side
    12,990.54x = 82,305,163.52
  5. Step 5: Solve for x
    x = 82,305,163.52/12,990.54
  6. Step 6: Final answer
    x = 6,335.78

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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.