Home / 12,858.20-19,286.49-4,099.40

Finding the Fourth Proportional to 12,858.20, 19,286.49 and 4,099.40

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Solution

The fourth proportional to 12,858.20, 19,286.49 and 4,099.40 is: 6,148.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.20 : 19,286.49 = 4,099.40 : x
  2. Step 2: Convert to fraction form
    12,858.20/19,286.49 = 4,099.40/x
  3. Step 3: Cross multiply
    12,858.20x = 19,286.49 × 4,099.40
  4. Step 4: Simplify right side
    12,858.20x = 79,063,037.11
  5. Step 5: Solve for x
    x = 79,063,037.11/12,858.20
  6. Step 6: Final answer
    x = 6,148.84

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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.