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Finding the Fourth Proportional to 13,321.89, 18,383.42 and 7,353.41

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Solution

The fourth proportional to 13,321.89, 18,383.42 and 7,353.41 is: 10,147.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.89 : 18,383.42 = 7,353.41 : x
  2. Step 2: Convert to fraction form
    13,321.89/18,383.42 = 7,353.41/x
  3. Step 3: Cross multiply
    13,321.89x = 18,383.42 × 7,353.41
  4. Step 4: Simplify right side
    13,321.89x = 135,180,750.93
  5. Step 5: Solve for x
    x = 135,180,750.93/13,321.89
  6. Step 6: Final answer
    x = 10,147.27

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1.5x scale

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.