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Finding the Fourth Proportional to 7,257.90, 10,891.70 and 2,640.90

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Solution

The fourth proportional to 7,257.90, 10,891.70 and 2,640.90 is: 3,963.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,257.90 : 10,891.70 = 2,640.90 : x
  2. Step 2: Convert to fraction form
    7,257.90/10,891.70 = 2,640.90/x
  3. Step 3: Cross multiply
    7,257.90x = 10,891.70 × 2,640.90
  4. Step 4: Simplify right side
    7,257.90x = 28,763,890.53
  5. Step 5: Solve for x
    x = 28,763,890.53/7,257.90
  6. Step 6: Final answer
    x = 3,963.11

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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.