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Finding the Fourth Proportional to 9,120.60, 13,679.10 and 4,440.60

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Solution

The fourth proportional to 9,120.60, 13,679.10 and 4,440.60 is: 6,660.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.60 : 13,679.10 = 4,440.60 : x
  2. Step 2: Convert to fraction form
    9,120.60/13,679.10 = 4,440.60/x
  3. Step 3: Cross multiply
    9,120.60x = 13,679.10 × 4,440.60
  4. Step 4: Simplify right side
    9,120.60x = 60,743,411.46
  5. Step 5: Solve for x
    x = 60,743,411.46/9,120.60
  6. Step 6: Final answer
    x = 6,660.02

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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.