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Finding the Fourth Proportional to 17,120.64, 25,680.96 and 9,344.64

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Solution

The fourth proportional to 17,120.64, 25,680.96 and 9,344.64 is: 14,016.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,120.64 : 25,680.96 = 9,344.64 : x
  2. Step 2: Convert to fraction form
    17,120.64/25,680.96 = 9,344.64/x
  3. Step 3: Cross multiply
    17,120.64x = 25,680.96 × 9,344.64
  4. Step 4: Simplify right side
    17,120.64x = 239,979,326.05
  5. Step 5: Solve for x
    x = 239,979,326.05/17,120.64
  6. Step 6: Final answer
    x = 14,016.96

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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.