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Finding the Fourth Proportional to 18,662.45, 27,992.70 and 6,974.78

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Solution

The fourth proportional to 18,662.45, 27,992.70 and 6,974.78 is: 10,461.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.45 : 27,992.70 = 6,974.78 : x
  2. Step 2: Convert to fraction form
    18,662.45/27,992.70 = 6,974.78/x
  3. Step 3: Cross multiply
    18,662.45x = 27,992.70 × 6,974.78
  4. Step 4: Simplify right side
    18,662.45x = 195,242,784.14
  5. Step 5: Solve for x
    x = 195,242,784.14/18,662.45
  6. Step 6: Final answer
    x = 10,461.80

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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.