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Finding the Fourth Proportional to 6,940.84, 10,409.64 and 4,721.44

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Solution

The fourth proportional to 6,940.84, 10,409.64 and 4,721.44 is: 7,081.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,940.84 : 10,409.64 = 4,721.44 : x
  2. Step 2: Convert to fraction form
    6,940.84/10,409.64 = 4,721.44/x
  3. Step 3: Cross multiply
    6,940.84x = 10,409.64 × 4,721.44
  4. Step 4: Simplify right side
    6,940.84x = 49,148,490.68
  5. Step 5: Solve for x
    x = 49,148,490.68/6,940.84
  6. Step 6: Final answer
    x = 7,081.06

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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.