Home / 21,161.50-29,202.87-11,731.50

Finding the Fourth Proportional to 21,161.50, 29,202.87 and 11,731.50

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Solution

The fourth proportional to 21,161.50, 29,202.87 and 11,731.50 is: 16,189.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.50 : 29,202.87 = 11,731.50 : x
  2. Step 2: Convert to fraction form
    21,161.50/29,202.87 = 11,731.50/x
  3. Step 3: Cross multiply
    21,161.50x = 29,202.87 × 11,731.50
  4. Step 4: Simplify right side
    21,161.50x = 342,593,469.41
  5. Step 5: Solve for x
    x = 342,593,469.41/21,161.50
  6. Step 6: Final answer
    x = 16,189.47

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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.