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Finding the Fourth Proportional to 11,238.70, 16,821.60 and 11,238.70

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Solution

The fourth proportional to 11,238.70, 16,821.60 and 11,238.70 is: 16,821.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,238.70 : 16,821.60 = 11,238.70 : x
  2. Step 2: Convert to fraction form
    11,238.70/16,821.60 = 11,238.70/x
  3. Step 3: Cross multiply
    11,238.70x = 16,821.60 × 11,238.70
  4. Step 4: Simplify right side
    11,238.70x = 189,052,915.92
  5. Step 5: Solve for x
    x = 189,052,915.92/11,238.70
  6. Step 6: Final answer
    x = 16,821.60

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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.