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Finding the Fourth Proportional to 17,999.28, 26,991 and 8,138.16

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Solution

The fourth proportional to 17,999.28, 26,991 and 8,138.16 is: 12,203.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,999.28 : 26,991 = 8,138.16 : x
  2. Step 2: Convert to fraction form
    17,999.28/26,991 = 8,138.16/x
  3. Step 3: Cross multiply
    17,999.28x = 26,991 × 8,138.16
  4. Step 4: Simplify right side
    17,999.28x = 219,657,076.56
  5. Step 5: Solve for x
    x = 219,657,076.56/17,999.28
  6. Step 6: Final answer
    x = 12,203.66

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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.