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Finding the Fourth Proportional to 13,789.41, 20,696.13 and 7,220.22

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Solution

The fourth proportional to 13,789.41, 20,696.13 and 7,220.22 is: 10,836.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.41 : 20,696.13 = 7,220.22 : x
  2. Step 2: Convert to fraction form
    13,789.41/20,696.13 = 7,220.22/x
  3. Step 3: Cross multiply
    13,789.41x = 20,696.13 × 7,220.22
  4. Step 4: Simplify right side
    13,789.41x = 149,430,611.75
  5. Step 5: Solve for x
    x = 149,430,611.75/13,789.41
  6. Step 6: Final answer
    x = 10,836.62

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1.5x scale

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.