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Finding the Fourth Proportional to 19,028.80, 28,540.84 and 7,936.84

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Solution

The fourth proportional to 19,028.80, 28,540.84 and 7,936.84 is: 11,904.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,028.80 : 28,540.84 = 7,936.84 : x
  2. Step 2: Convert to fraction form
    19,028.80/28,540.84 = 7,936.84/x
  3. Step 3: Cross multiply
    19,028.80x = 28,540.84 × 7,936.84
  4. Step 4: Simplify right side
    19,028.80x = 226,524,080.55
  5. Step 5: Solve for x
    x = 226,524,080.55/19,028.80
  6. Step 6: Final answer
    x = 11,904.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.