Home / 12,891.40-19,339.26-4,125.40

Finding the Fourth Proportional to 12,891.40, 19,339.26 and 4,125.40

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Solution

The fourth proportional to 12,891.40, 19,339.26 and 4,125.40 is: 6,188.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.40 : 19,339.26 = 4,125.40 : x
  2. Step 2: Convert to fraction form
    12,891.40/19,339.26 = 4,125.40/x
  3. Step 3: Cross multiply
    12,891.40x = 19,339.26 × 4,125.40
  4. Step 4: Simplify right side
    12,891.40x = 79,782,183.20
  5. Step 5: Solve for x
    x = 79,782,183.20/12,891.40
  6. Step 6: Final answer
    x = 6,188.79

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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.