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Finding the Fourth Proportional to 11,485.60, 17,150.60 and 9,119.05

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Solution

The fourth proportional to 11,485.60, 17,150.60 and 9,119.05 is: 13,616.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,485.60 : 17,150.60 = 9,119.05 : x
  2. Step 2: Convert to fraction form
    11,485.60/17,150.60 = 9,119.05/x
  3. Step 3: Cross multiply
    11,485.60x = 17,150.60 × 9,119.05
  4. Step 4: Simplify right side
    11,485.60x = 156,397,158.85
  5. Step 5: Solve for x
    x = 156,397,158.85/11,485.60
  6. Step 6: Final answer
    x = 13,616.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.