Home / 3,889.50-5,819.67-2,421.78

Finding the Fourth Proportional to 3,889.50, 5,819.67 and 2,421.78

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Solution

The fourth proportional to 3,889.50, 5,819.67 and 2,421.78 is: 3,623.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.50 : 5,819.67 = 2,421.78 : x
  2. Step 2: Convert to fraction form
    3,889.50/5,819.67 = 2,421.78/x
  3. Step 3: Cross multiply
    3,889.50x = 5,819.67 × 2,421.78
  4. Step 4: Simplify right side
    3,889.50x = 14,093,960.41
  5. Step 5: Solve for x
    x = 14,093,960.41/3,889.50
  6. Step 6: Final answer
    x = 3,623.59

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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.