Home / 21,169.56-31,754.36-5,375.78

Finding the Fourth Proportional to 21,169.56, 31,754.36 and 5,375.78

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Solution

The fourth proportional to 21,169.56, 31,754.36 and 5,375.78 is: 8,063.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.56 : 31,754.36 = 5,375.78 : x
  2. Step 2: Convert to fraction form
    21,169.56/31,754.36 = 5,375.78/x
  3. Step 3: Cross multiply
    21,169.56x = 31,754.36 × 5,375.78
  4. Step 4: Simplify right side
    21,169.56x = 170,704,374.01
  5. Step 5: Solve for x
    x = 170,704,374.01/21,169.56
  6. Step 6: Final answer
    x = 8,063.67

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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.