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Finding the Fourth Proportional to 7,487.76, 11,231.61 and 1,940.64

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Solution

The fourth proportional to 7,487.76, 11,231.61 and 1,940.64 is: 2,910.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.76 : 11,231.61 = 1,940.64 : x
  2. Step 2: Convert to fraction form
    7,487.76/11,231.61 = 1,940.64/x
  3. Step 3: Cross multiply
    7,487.76x = 11,231.61 × 1,940.64
  4. Step 4: Simplify right side
    7,487.76x = 21,796,511.63
  5. Step 5: Solve for x
    x = 21,796,511.63/7,487.76
  6. Step 6: Final answer
    x = 2,910.95

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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.