Home / 21,072.05-29,078.44-12,579.81

Finding the Fourth Proportional to 21,072.05, 29,078.44 and 12,579.81

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Solution

The fourth proportional to 21,072.05, 29,078.44 and 12,579.81 is: 17,359.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.05 : 29,078.44 = 12,579.81 : x
  2. Step 2: Convert to fraction form
    21,072.05/29,078.44 = 12,579.81/x
  3. Step 3: Cross multiply
    21,072.05x = 29,078.44 × 12,579.81
  4. Step 4: Simplify right side
    21,072.05x = 365,801,180.56
  5. Step 5: Solve for x
    x = 365,801,180.56/21,072.05
  6. Step 6: Final answer
    x = 17,359.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.