Home / 10,872.90-16,309.35-3,081.78

Finding the Fourth Proportional to 10,872.90, 16,309.35 and 3,081.78

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Solution

The fourth proportional to 10,872.90, 16,309.35 and 3,081.78 is: 4,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,872.90 : 16,309.35 = 3,081.78 : x
  2. Step 2: Convert to fraction form
    10,872.90/16,309.35 = 3,081.78/x
  3. Step 3: Cross multiply
    10,872.90x = 16,309.35 × 3,081.78
  4. Step 4: Simplify right side
    10,872.90x = 50,261,828.64
  5. Step 5: Solve for x
    x = 50,261,828.64/10,872.90
  6. Step 6: Final answer
    x = 4,622.67

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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.