Home / 5,428.85-8,145.90-2,144.70

Finding the Fourth Proportional to 5,428.85, 8,145.90 and 2,144.70

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Solution

The fourth proportional to 5,428.85, 8,145.90 and 2,144.70 is: 3,218.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.85 : 8,145.90 = 2,144.70 : x
  2. Step 2: Convert to fraction form
    5,428.85/8,145.90 = 2,144.70/x
  3. Step 3: Cross multiply
    5,428.85x = 8,145.90 × 2,144.70
  4. Step 4: Simplify right side
    5,428.85x = 17,470,511.73
  5. Step 5: Solve for x
    x = 17,470,511.73/5,428.85
  6. Step 6: Final answer
    x = 3,218.09

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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.