Home / 12,318.40-18,467.60-3,880.56

Finding the Fourth Proportional to 12,318.40, 18,467.60 and 3,880.56

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Solution

The fourth proportional to 12,318.40, 18,467.60 and 3,880.56 is: 5,817.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.40 : 18,467.60 = 3,880.56 : x
  2. Step 2: Convert to fraction form
    12,318.40/18,467.60 = 3,880.56/x
  3. Step 3: Cross multiply
    12,318.40x = 18,467.60 × 3,880.56
  4. Step 4: Simplify right side
    12,318.40x = 71,664,629.86
  5. Step 5: Solve for x
    x = 71,664,629.86/12,318.40
  6. Step 6: Final answer
    x = 5,817.69

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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.