Home / 20,940.53-28,897.56-11,509.09

Finding the Fourth Proportional to 20,940.53, 28,897.56 and 11,509.09

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Solution

The fourth proportional to 20,940.53, 28,897.56 and 11,509.09 is: 15,882.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.53 : 28,897.56 = 11,509.09 : x
  2. Step 2: Convert to fraction form
    20,940.53/28,897.56 = 11,509.09/x
  3. Step 3: Cross multiply
    20,940.53x = 28,897.56 × 11,509.09
  4. Step 4: Simplify right side
    20,940.53x = 332,584,546.58
  5. Step 5: Solve for x
    x = 332,584,546.58/20,940.53
  6. Step 6: Final answer
    x = 15,882.34

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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.