Home / 2,620.12-3,930.23-2,097.70

Finding the Fourth Proportional to 2,620.12, 3,930.23 and 2,097.70

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Solution

The fourth proportional to 2,620.12, 3,930.23 and 2,097.70 is: 3,146.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.12 : 3,930.23 = 2,097.70 : x
  2. Step 2: Convert to fraction form
    2,620.12/3,930.23 = 2,097.70/x
  3. Step 3: Cross multiply
    2,620.12x = 3,930.23 × 2,097.70
  4. Step 4: Simplify right side
    2,620.12x = 8,244,423.82
  5. Step 5: Solve for x
    x = 8,244,423.82/2,620.12
  6. Step 6: Final answer
    x = 3,146.58

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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.