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Finding the Fourth Proportional to 13,745.16, 20,620.49 and 5,847.63

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Solution

The fourth proportional to 13,745.16, 20,620.49 and 5,847.63 is: 8,772.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.16 : 20,620.49 = 5,847.63 : x
  2. Step 2: Convert to fraction form
    13,745.16/20,620.49 = 5,847.63/x
  3. Step 3: Cross multiply
    13,745.16x = 20,620.49 × 5,847.63
  4. Step 4: Simplify right side
    13,745.16x = 120,580,966.70
  5. Step 5: Solve for x
    x = 120,580,966.70/13,745.16
  6. Step 6: Final answer
    x = 8,772.61

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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.