Home / 12,750.75-19,128.29-3,983.92

Finding the Fourth Proportional to 12,750.75, 19,128.29 and 3,983.92

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Solution

The fourth proportional to 12,750.75, 19,128.29 and 3,983.92 is: 5,976.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.75 : 19,128.29 = 3,983.92 : x
  2. Step 2: Convert to fraction form
    12,750.75/19,128.29 = 3,983.92/x
  3. Step 3: Cross multiply
    12,750.75x = 19,128.29 × 3,983.92
  4. Step 4: Simplify right side
    12,750.75x = 76,205,509.36
  5. Step 5: Solve for x
    x = 76,205,509.36/12,750.75
  6. Step 6: Final answer
    x = 5,976.55

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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.