Home / 11,772.72-17,661.62-3,981.36

Finding the Fourth Proportional to 11,772.72, 17,661.62 and 3,981.36

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Solution

The fourth proportional to 11,772.72, 17,661.62 and 3,981.36 is: 5,972.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,772.72 : 17,661.62 = 3,981.36 : x
  2. Step 2: Convert to fraction form
    11,772.72/17,661.62 = 3,981.36/x
  3. Step 3: Cross multiply
    11,772.72x = 17,661.62 × 3,981.36
  4. Step 4: Simplify right side
    11,772.72x = 70,317,267.40
  5. Step 5: Solve for x
    x = 70,317,267.40/11,772.72
  6. Step 6: Final answer
    x = 5,972.90

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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.