Home / 12,978.33-19,490.97-11,936.46

Finding the Fourth Proportional to 12,978.33, 19,490.97 and 11,936.46

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Solution

The fourth proportional to 12,978.33, 19,490.97 and 11,936.46 is: 17,926.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978.33 : 19,490.97 = 11,936.46 : x
  2. Step 2: Convert to fraction form
    12,978.33/19,490.97 = 11,936.46/x
  3. Step 3: Cross multiply
    12,978.33x = 19,490.97 × 11,936.46
  4. Step 4: Simplify right side
    12,978.33x = 232,653,183.77
  5. Step 5: Solve for x
    x = 232,653,183.77/12,978.33
  6. Step 6: Final answer
    x = 17,926.28

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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.