Home / 13,161.81-19,720.44-7,956.75

Finding the Fourth Proportional to 13,161.81, 19,720.44 and 7,956.75

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Solution

The fourth proportional to 13,161.81, 19,720.44 and 7,956.75 is: 11,921.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.81 : 19,720.44 = 7,956.75 : x
  2. Step 2: Convert to fraction form
    13,161.81/19,720.44 = 7,956.75/x
  3. Step 3: Cross multiply
    13,161.81x = 19,720.44 × 7,956.75
  4. Step 4: Simplify right side
    13,161.81x = 156,910,610.97
  5. Step 5: Solve for x
    x = 156,910,610.97/13,161.81
  6. Step 6: Final answer
    x = 11,921.66

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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.