Home / 12,750.50-19,128.44-3,986.07

Finding the Fourth Proportional to 12,750.50, 19,128.44 and 3,986.07

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Solution

The fourth proportional to 12,750.50, 19,128.44 and 3,986.07 is: 5,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.50 : 19,128.44 = 3,986.07 : x
  2. Step 2: Convert to fraction form
    12,750.50/19,128.44 = 3,986.07/x
  3. Step 3: Cross multiply
    12,750.50x = 19,128.44 × 3,986.07
  4. Step 4: Simplify right side
    12,750.50x = 76,247,310.80
  5. Step 5: Solve for x
    x = 76,247,310.80/12,750.50
  6. Step 6: Final answer
    x = 5,979.95

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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.