Home / 12,942.78-19,409.38-4,620.56

Finding the Fourth Proportional to 12,942.78, 19,409.38 and 4,620.56

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Solution

The fourth proportional to 12,942.78, 19,409.38 and 4,620.56 is: 6,929.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,942.78 : 19,409.38 = 4,620.56 : x
  2. Step 2: Convert to fraction form
    12,942.78/19,409.38 = 4,620.56/x
  3. Step 3: Cross multiply
    12,942.78x = 19,409.38 × 4,620.56
  4. Step 4: Simplify right side
    12,942.78x = 89,682,204.85
  5. Step 5: Solve for x
    x = 89,682,204.85/12,942.78
  6. Step 6: Final answer
    x = 6,929.13

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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.