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Finding the Fourth Proportional to 11,090.70, 16,660.35 and 8,187.66

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Solution

The fourth proportional to 11,090.70, 16,660.35 and 8,187.66 is: 12,299.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,090.70 : 16,660.35 = 8,187.66 : x
  2. Step 2: Convert to fraction form
    11,090.70/16,660.35 = 8,187.66/x
  3. Step 3: Cross multiply
    11,090.70x = 16,660.35 × 8,187.66
  4. Step 4: Simplify right side
    11,090.70x = 136,409,281.28
  5. Step 5: Solve for x
    x = 136,409,281.28/11,090.70
  6. Step 6: Final answer
    x = 12,299.43

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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.