Home / 11,819.78-16,311.41-6,514.80

Finding the Fourth Proportional to 11,819.78, 16,311.41 and 6,514.80

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Solution

The fourth proportional to 11,819.78, 16,311.41 and 6,514.80 is: 8,990.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,819.78 : 16,311.41 = 6,514.80 : x
  2. Step 2: Convert to fraction form
    11,819.78/16,311.41 = 6,514.80/x
  3. Step 3: Cross multiply
    11,819.78x = 16,311.41 × 6,514.80
  4. Step 4: Simplify right side
    11,819.78x = 106,265,573.87
  5. Step 5: Solve for x
    x = 106,265,573.87/11,819.78
  6. Step 6: Final answer
    x = 8,990.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.