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Finding the Fourth Proportional to 13,600.60, 20,400.90 and 4,845.40

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Solution

The fourth proportional to 13,600.60, 20,400.90 and 4,845.40 is: 7,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,600.60 : 20,400.90 = 4,845.40 : x
  2. Step 2: Convert to fraction form
    13,600.60/20,400.90 = 4,845.40/x
  3. Step 3: Cross multiply
    13,600.60x = 20,400.90 × 4,845.40
  4. Step 4: Simplify right side
    13,600.60x = 98,850,520.86
  5. Step 5: Solve for x
    x = 98,850,520.86/13,600.60
  6. Step 6: Final answer
    x = 7,268.10

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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.