Home / 8,190.36-12,278.76-3,190.26

Finding the Fourth Proportional to 8,190.36, 12,278.76 and 3,190.26

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Solution

The fourth proportional to 8,190.36, 12,278.76 and 3,190.26 is: 4,782.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.36 : 12,278.76 = 3,190.26 : x
  2. Step 2: Convert to fraction form
    8,190.36/12,278.76 = 3,190.26/x
  3. Step 3: Cross multiply
    8,190.36x = 12,278.76 × 3,190.26
  4. Step 4: Simplify right side
    8,190.36x = 39,172,436.88
  5. Step 5: Solve for x
    x = 39,172,436.88/8,190.36
  6. Step 6: Final answer
    x = 4,782.75

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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.