Home / 13,912.35-20,871.26-5,147.34

Finding the Fourth Proportional to 13,912.35, 20,871.26 and 5,147.34

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Solution

The fourth proportional to 13,912.35, 20,871.26 and 5,147.34 is: 7,722.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.35 : 20,871.26 = 5,147.34 : x
  2. Step 2: Convert to fraction form
    13,912.35/20,871.26 = 5,147.34/x
  3. Step 3: Cross multiply
    13,912.35x = 20,871.26 × 5,147.34
  4. Step 4: Simplify right side
    13,912.35x = 107,431,484.32
  5. Step 5: Solve for x
    x = 107,431,484.32/13,912.35
  6. Step 6: Final answer
    x = 7,722.02

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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.