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Finding the Fourth Proportional to 13,611.70, 20,424.97 and 5,292.03

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Solution

The fourth proportional to 13,611.70, 20,424.97 and 5,292.03 is: 7,940.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.70 : 20,424.97 = 5,292.03 : x
  2. Step 2: Convert to fraction form
    13,611.70/20,424.97 = 5,292.03/x
  3. Step 3: Cross multiply
    13,611.70x = 20,424.97 × 5,292.03
  4. Step 4: Simplify right side
    13,611.70x = 108,089,553.99
  5. Step 5: Solve for x
    x = 108,089,553.99/13,611.70
  6. Step 6: Final answer
    x = 7,940.93

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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.