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Finding the Fourth Proportional to 11,771.56, 16,230 and 8,622.28

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Solution

The fourth proportional to 11,771.56, 16,230 and 8,622.28 is: 11,887.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,771.56 : 16,230 = 8,622.28 : x
  2. Step 2: Convert to fraction form
    11,771.56/16,230 = 8,622.28/x
  3. Step 3: Cross multiply
    11,771.56x = 16,230 × 8,622.28
  4. Step 4: Simplify right side
    11,771.56x = 139,939,604.40
  5. Step 5: Solve for x
    x = 139,939,604.40/11,771.56
  6. Step 6: Final answer
    x = 11,887.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.