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Finding the Fourth Proportional to 19,351.89, 29,040.78 and 7,039.89

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Solution

The fourth proportional to 19,351.89, 29,040.78 and 7,039.89 is: 10,564.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,351.89 : 29,040.78 = 7,039.89 : x
  2. Step 2: Convert to fraction form
    19,351.89/29,040.78 = 7,039.89/x
  3. Step 3: Cross multiply
    19,351.89x = 29,040.78 × 7,039.89
  4. Step 4: Simplify right side
    19,351.89x = 204,443,896.71
  5. Step 5: Solve for x
    x = 204,443,896.71/19,351.89
  6. Step 6: Final answer
    x = 10,564.54

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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.