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Finding the Fourth Proportional to 28,745.92, 43,107.20 and 9,018.40

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Solution

The fourth proportional to 28,745.92, 43,107.20 and 9,018.40 is: 13,523.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,745.92 : 43,107.20 = 9,018.40 : x
  2. Step 2: Convert to fraction form
    28,745.92/43,107.20 = 9,018.40/x
  3. Step 3: Cross multiply
    28,745.92x = 43,107.20 × 9,018.40
  4. Step 4: Simplify right side
    28,745.92x = 388,757,972.48
  5. Step 5: Solve for x
    x = 388,757,972.48/28,745.92
  6. Step 6: Final answer
    x = 13,523.94

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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.