Home / 12,911.27-19,367.78-5,515.70

Finding the Fourth Proportional to 12,911.27, 19,367.78 and 5,515.70

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Solution

The fourth proportional to 12,911.27, 19,367.78 and 5,515.70 is: 8,273.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.27 : 19,367.78 = 5,515.70 : x
  2. Step 2: Convert to fraction form
    12,911.27/19,367.78 = 5,515.70/x
  3. Step 3: Cross multiply
    12,911.27x = 19,367.78 × 5,515.70
  4. Step 4: Simplify right side
    12,911.27x = 106,826,739.73
  5. Step 5: Solve for x
    x = 106,826,739.73/12,911.27
  6. Step 6: Final answer
    x = 8,273.92

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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.