Home / 20,912.52-28,860.02-11,481.80

Finding the Fourth Proportional to 20,912.52, 28,860.02 and 11,481.80

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Solution

The fourth proportional to 20,912.52, 28,860.02 and 11,481.80 is: 15,845.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.52 : 28,860.02 = 11,481.80 : x
  2. Step 2: Convert to fraction form
    20,912.52/28,860.02 = 11,481.80/x
  3. Step 3: Cross multiply
    20,912.52x = 28,860.02 × 11,481.80
  4. Step 4: Simplify right side
    20,912.52x = 331,364,977.64
  5. Step 5: Solve for x
    x = 331,364,977.64/20,912.52
  6. Step 6: Final answer
    x = 15,845.29

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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.