Home / 12,745.48-19,120.62-3,978.28

Finding the Fourth Proportional to 12,745.48, 19,120.62 and 3,978.28

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Solution

The fourth proportional to 12,745.48, 19,120.62 and 3,978.28 is: 5,968.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,745.48 : 19,120.62 = 3,978.28 : x
  2. Step 2: Convert to fraction form
    12,745.48/19,120.62 = 3,978.28/x
  3. Step 3: Cross multiply
    12,745.48x = 19,120.62 × 3,978.28
  4. Step 4: Simplify right side
    12,745.48x = 76,067,180.13
  5. Step 5: Solve for x
    x = 76,067,180.13/12,745.48
  6. Step 6: Final answer
    x = 5,968.17

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1.5x scale

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.