Home / 4,815.39-6,639.78-3,928.44

Finding the Fourth Proportional to 4,815.39, 6,639.78 and 3,928.44

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Solution

The fourth proportional to 4,815.39, 6,639.78 and 3,928.44 is: 5,416.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,815.39 : 6,639.78 = 3,928.44 : x
  2. Step 2: Convert to fraction form
    4,815.39/6,639.78 = 3,928.44/x
  3. Step 3: Cross multiply
    4,815.39x = 6,639.78 × 3,928.44
  4. Step 4: Simplify right side
    4,815.39x = 26,083,977.34
  5. Step 5: Solve for x
    x = 26,083,977.34/4,815.39
  6. Step 6: Final answer
    x = 5,416.79

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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.