Home / 20,560.20-30,826.80-8,072.70

Finding the Fourth Proportional to 20,560.20, 30,826.80 and 8,072.70

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Solution

The fourth proportional to 20,560.20, 30,826.80 and 8,072.70 is: 12,103.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.20 : 30,826.80 = 8,072.70 : x
  2. Step 2: Convert to fraction form
    20,560.20/30,826.80 = 8,072.70/x
  3. Step 3: Cross multiply
    20,560.20x = 30,826.80 × 8,072.70
  4. Step 4: Simplify right side
    20,560.20x = 248,855,508.36
  5. Step 5: Solve for x
    x = 248,855,508.36/20,560.20
  6. Step 6: Final answer
    x = 12,103.75

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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.