Home / 18,680.31-28,020.85-7,579.41

Finding the Fourth Proportional to 18,680.31, 28,020.85 and 7,579.41

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Solution

The fourth proportional to 18,680.31, 28,020.85 and 7,579.41 is: 11,369.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.31 : 28,020.85 = 7,579.41 : x
  2. Step 2: Convert to fraction form
    18,680.31/28,020.85 = 7,579.41/x
  3. Step 3: Cross multiply
    18,680.31x = 28,020.85 × 7,579.41
  4. Step 4: Simplify right side
    18,680.31x = 212,381,450.87
  5. Step 5: Solve for x
    x = 212,381,450.87/18,680.31
  6. Step 6: Final answer
    x = 11,369.27

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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.