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Finding the Fourth Proportional to 13,936.16, 20,863.92 and 9,310.88

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Solution

The fourth proportional to 13,936.16, 20,863.92 and 9,310.88 is: 13,939.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,936.16 : 20,863.92 = 9,310.88 : x
  2. Step 2: Convert to fraction form
    13,936.16/20,863.92 = 9,310.88/x
  3. Step 3: Cross multiply
    13,936.16x = 20,863.92 × 9,310.88
  4. Step 4: Simplify right side
    13,936.16x = 194,261,455.45
  5. Step 5: Solve for x
    x = 194,261,455.45/13,936.16
  6. Step 6: Final answer
    x = 13,939.38

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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.