Home / 20,940.36-28,897.92-11,509.20

Finding the Fourth Proportional to 20,940.36, 28,897.92 and 11,509.20

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Solution

The fourth proportional to 20,940.36, 28,897.92 and 11,509.20 is: 15,882.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.36 : 28,897.92 = 11,509.20 : x
  2. Step 2: Convert to fraction form
    20,940.36/28,897.92 = 11,509.20/x
  3. Step 3: Cross multiply
    20,940.36x = 28,897.92 × 11,509.20
  4. Step 4: Simplify right side
    20,940.36x = 332,591,940.86
  5. Step 5: Solve for x
    x = 332,591,940.86/20,940.36
  6. Step 6: Final answer
    x = 15,882.82

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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.