Home / 18,928.78-28,396.60-7,829.44

Finding the Fourth Proportional to 18,928.78, 28,396.60 and 7,829.44

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Solution

The fourth proportional to 18,928.78, 28,396.60 and 7,829.44 is: 11,745.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.78 : 28,396.60 = 7,829.44 : x
  2. Step 2: Convert to fraction form
    18,928.78/28,396.60 = 7,829.44/x
  3. Step 3: Cross multiply
    18,928.78x = 28,396.60 × 7,829.44
  4. Step 4: Simplify right side
    18,928.78x = 222,329,475.90
  5. Step 5: Solve for x
    x = 222,329,475.90/18,928.78
  6. Step 6: Final answer
    x = 11,745.58

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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.