Home / 20,940.75-28,898.28-11,509.38

Finding the Fourth Proportional to 20,940.75, 28,898.28 and 11,509.38

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Solution

The fourth proportional to 20,940.75, 28,898.28 and 11,509.38 is: 15,882.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.75 : 28,898.28 = 11,509.38 : x
  2. Step 2: Convert to fraction form
    20,940.75/28,898.28 = 11,509.38/x
  3. Step 3: Cross multiply
    20,940.75x = 28,898.28 × 11,509.38
  4. Step 4: Simplify right side
    20,940.75x = 332,601,285.87
  5. Step 5: Solve for x
    x = 332,601,285.87/20,940.75
  6. Step 6: Final answer
    x = 15,882.97

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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.