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Finding the Fourth Proportional to 14,997.91, 20,696.74 and 8,191.65

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Solution

The fourth proportional to 14,997.91, 20,696.74 and 8,191.65 is: 11,304.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,997.91 : 20,696.74 = 8,191.65 : x
  2. Step 2: Convert to fraction form
    14,997.91/20,696.74 = 8,191.65/x
  3. Step 3: Cross multiply
    14,997.91x = 20,696.74 × 8,191.65
  4. Step 4: Simplify right side
    14,997.91x = 169,540,450.22
  5. Step 5: Solve for x
    x = 169,540,450.22/14,997.91
  6. Step 6: Final answer
    x = 11,304.27

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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.