Home / 11,487.78-17,223.91-3,989.41

Finding the Fourth Proportional to 11,487.78, 17,223.91 and 3,989.41

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Solution

The fourth proportional to 11,487.78, 17,223.91 and 3,989.41 is: 5,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487.78 : 17,223.91 = 3,989.41 : x
  2. Step 2: Convert to fraction form
    11,487.78/17,223.91 = 3,989.41/x
  3. Step 3: Cross multiply
    11,487.78x = 17,223.91 × 3,989.41
  4. Step 4: Simplify right side
    11,487.78x = 68,713,185.76
  5. Step 5: Solve for x
    x = 68,713,185.76/11,487.78
  6. Step 6: Final answer
    x = 5,981.42

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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.