Home / 20,930.36-28,884.56-11,499.12

Finding the Fourth Proportional to 20,930.36, 28,884.56 and 11,499.12

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Solution

The fourth proportional to 20,930.36, 28,884.56 and 11,499.12 is: 15,869.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.36 : 28,884.56 = 11,499.12 : x
  2. Step 2: Convert to fraction form
    20,930.36/28,884.56 = 11,499.12/x
  3. Step 3: Cross multiply
    20,930.36x = 28,884.56 × 11,499.12
  4. Step 4: Simplify right side
    20,930.36x = 332,147,021.59
  5. Step 5: Solve for x
    x = 332,147,021.59/20,930.36
  6. Step 6: Final answer
    x = 15,869.15

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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.