Home / 12,769.78-19,143.30-4,976.80

Finding the Fourth Proportional to 12,769.78, 19,143.30 and 4,976.80

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Solution

The fourth proportional to 12,769.78, 19,143.30 and 4,976.80 is: 7,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,769.78 : 19,143.30 = 4,976.80 : x
  2. Step 2: Convert to fraction form
    12,769.78/19,143.30 = 4,976.80/x
  3. Step 3: Cross multiply
    12,769.78x = 19,143.30 × 4,976.80
  4. Step 4: Simplify right side
    12,769.78x = 95,272,375.44
  5. Step 5: Solve for x
    x = 95,272,375.44/12,769.78
  6. Step 6: Final answer
    x = 7,460.77

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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.