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Finding the Fourth Proportional to 18,405.80, 27,608.94 and 5,258.60

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Solution

The fourth proportional to 18,405.80, 27,608.94 and 5,258.60 is: 7,887.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.80 : 27,608.94 = 5,258.60 : x
  2. Step 2: Convert to fraction form
    18,405.80/27,608.94 = 5,258.60/x
  3. Step 3: Cross multiply
    18,405.80x = 27,608.94 × 5,258.60
  4. Step 4: Simplify right side
    18,405.80x = 145,184,371.88
  5. Step 5: Solve for x
    x = 145,184,371.88/18,405.80
  6. Step 6: Final answer
    x = 7,887.97

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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.