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Finding the Fourth Proportional to 8,478.64, 11,704.44 and 4,940.56

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Solution

The fourth proportional to 8,478.64, 11,704.44 and 4,940.56 is: 6,820.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.64 : 11,704.44 = 4,940.56 : x
  2. Step 2: Convert to fraction form
    8,478.64/11,704.44 = 4,940.56/x
  3. Step 3: Cross multiply
    8,478.64x = 11,704.44 × 4,940.56
  4. Step 4: Simplify right side
    8,478.64x = 57,826,488.09
  5. Step 5: Solve for x
    x = 57,826,488.09/8,478.64
  6. Step 6: Final answer
    x = 6,820.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.