Home / 20,912.03-28,858.65-11,481.20

Finding the Fourth Proportional to 20,912.03, 28,858.65 and 11,481.20

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Solution

The fourth proportional to 20,912.03, 28,858.65 and 11,481.20 is: 15,844.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.03 : 28,858.65 = 11,481.20 : x
  2. Step 2: Convert to fraction form
    20,912.03/28,858.65 = 11,481.20/x
  3. Step 3: Cross multiply
    20,912.03x = 28,858.65 × 11,481.20
  4. Step 4: Simplify right side
    20,912.03x = 331,331,932.38
  5. Step 5: Solve for x
    x = 331,331,932.38/20,912.03
  6. Step 6: Final answer
    x = 15,844.08

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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.