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Finding the Fourth Proportional to 18,661.60, 27,999.69 and 6,975.73

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Solution

The fourth proportional to 18,661.60, 27,999.69 and 6,975.73 is: 10,466.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.60 : 27,999.69 = 6,975.73 : x
  2. Step 2: Convert to fraction form
    18,661.60/27,999.69 = 6,975.73/x
  3. Step 3: Cross multiply
    18,661.60x = 27,999.69 × 6,975.73
  4. Step 4: Simplify right side
    18,661.60x = 195,318,277.52
  5. Step 5: Solve for x
    x = 195,318,277.52/18,661.60
  6. Step 6: Final answer
    x = 10,466.32

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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.