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Finding the Fourth Proportional to 15,190.80, 20,932.20 and 11,205.60

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Solution

The fourth proportional to 15,190.80, 20,932.20 and 11,205.60 is: 15,440.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,190.80 : 20,932.20 = 11,205.60 : x
  2. Step 2: Convert to fraction form
    15,190.80/20,932.20 = 11,205.60/x
  3. Step 3: Cross multiply
    15,190.80x = 20,932.20 × 11,205.60
  4. Step 4: Simplify right side
    15,190.80x = 234,557,860.32
  5. Step 5: Solve for x
    x = 234,557,860.32/15,190.80
  6. Step 6: Final answer
    x = 15,440.78

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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.