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Finding the Fourth Proportional to 6,638,978.19, 9,162,662.97 and 3,738,936

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Solution

The fourth proportional to 6,638,978.19, 9,162,662.97 and 3,738,936 is: 5,160,223.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638,978.19 : 9,162,662.97 = 3,738,936 : x
  2. Step 2: Convert to fraction form
    6,638,978.19/9,162,662.97 = 3,738,936/x
  3. Step 3: Cross multiply
    6,638,978.19x = 9,162,662.97 × 3,738,936
  4. Step 4: Simplify right side
    6,638,978.19x = 34,258,610,434,399.92
  5. Step 5: Solve for x
    x = 34,258,610,434,399.92/6,638,978.19
  6. Step 6: Final answer
    x = 5,160,223.37

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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.