Home / 13,289.88-19,938.45-3,930.36

Finding the Fourth Proportional to 13,289.88, 19,938.45 and 3,930.36

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Solution

The fourth proportional to 13,289.88, 19,938.45 and 3,930.36 is: 5,896.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.88 : 19,938.45 = 3,930.36 : x
  2. Step 2: Convert to fraction form
    13,289.88/19,938.45 = 3,930.36/x
  3. Step 3: Cross multiply
    13,289.88x = 19,938.45 × 3,930.36
  4. Step 4: Simplify right side
    13,289.88x = 78,365,286.34
  5. Step 5: Solve for x
    x = 78,365,286.34/13,289.88
  6. Step 6: Final answer
    x = 5,896.61

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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.