Home / 42,721.41-64,072.26-12,729.54

Finding the Fourth Proportional to 42,721.41, 64,072.26 and 12,729.54

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Solution

The fourth proportional to 42,721.41, 64,072.26 and 12,729.54 is: 19,091.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,721.41 : 64,072.26 = 12,729.54 : x
  2. Step 2: Convert to fraction form
    42,721.41/64,072.26 = 12,729.54/x
  3. Step 3: Cross multiply
    42,721.41x = 64,072.26 × 12,729.54
  4. Step 4: Simplify right side
    42,721.41x = 815,610,396.56
  5. Step 5: Solve for x
    x = 815,610,396.56/42,721.41
  6. Step 6: Final answer
    x = 19,091.37

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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.