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Finding the Fourth Proportional to 18,069.21, 27,099.90 and 6,972.21

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Solution

The fourth proportional to 18,069.21, 27,099.90 and 6,972.21 is: 10,456.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,069.21 : 27,099.90 = 6,972.21 : x
  2. Step 2: Convert to fraction form
    18,069.21/27,099.90 = 6,972.21/x
  3. Step 3: Cross multiply
    18,069.21x = 27,099.90 × 6,972.21
  4. Step 4: Simplify right side
    18,069.21x = 188,946,193.78
  5. Step 5: Solve for x
    x = 188,946,193.78/18,069.21
  6. Step 6: Final answer
    x = 10,456.80

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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.