Home / 20,940.20-28,896.41-11,509.10

Finding the Fourth Proportional to 20,940.20, 28,896.41 and 11,509.10

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Solution

The fourth proportional to 20,940.20, 28,896.41 and 11,509.10 is: 15,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.20 : 28,896.41 = 11,509.10 : x
  2. Step 2: Convert to fraction form
    20,940.20/28,896.41 = 11,509.10/x
  3. Step 3: Cross multiply
    20,940.20x = 28,896.41 × 11,509.10
  4. Step 4: Simplify right side
    20,940.20x = 332,571,672.33
  5. Step 5: Solve for x
    x = 332,571,672.33/20,940.20
  6. Step 6: Final answer
    x = 15,881.97

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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.