Home / 5,107.40-7,657.20-2,640.65

Finding the Fourth Proportional to 5,107.40, 7,657.20 and 2,640.65

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Solution

The fourth proportional to 5,107.40, 7,657.20 and 2,640.65 is: 3,958.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,107.40 : 7,657.20 = 2,640.65 : x
  2. Step 2: Convert to fraction form
    5,107.40/7,657.20 = 2,640.65/x
  3. Step 3: Cross multiply
    5,107.40x = 7,657.20 × 2,640.65
  4. Step 4: Simplify right side
    5,107.40x = 20,219,956.80
  5. Step 5: Solve for x
    x = 20,219,956.80/5,107.40
  6. Step 6: Final answer
    x = 3,958.95

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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.