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Finding the Fourth Proportional to 9,121.60, 13,680.60 and 4,441.60

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Solution

The fourth proportional to 9,121.60, 13,680.60 and 4,441.60 is: 6,661.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.60 : 13,680.60 = 4,441.60 : x
  2. Step 2: Convert to fraction form
    9,121.60/13,680.60 = 4,441.60/x
  3. Step 3: Cross multiply
    9,121.60x = 13,680.60 × 4,441.60
  4. Step 4: Simplify right side
    9,121.60x = 60,763,752.96
  5. Step 5: Solve for x
    x = 60,763,752.96/9,121.60
  6. Step 6: Final answer
    x = 6,661.52

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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.