Home / 12,751.80-19,121.10-3,984.36

Finding the Fourth Proportional to 12,751.80, 19,121.10 and 3,984.36

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Solution

The fourth proportional to 12,751.80, 19,121.10 and 3,984.36 is: 5,974.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.80 : 19,121.10 = 3,984.36 : x
  2. Step 2: Convert to fraction form
    12,751.80/19,121.10 = 3,984.36/x
  3. Step 3: Cross multiply
    12,751.80x = 19,121.10 × 3,984.36
  4. Step 4: Simplify right side
    12,751.80x = 76,185,346.00
  5. Step 5: Solve for x
    x = 76,185,346.00/12,751.80
  6. Step 6: Final answer
    x = 5,974.48

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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.