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Finding the Fourth Proportional to 13,279.71, 18,323.49 and 8,245.15

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Solution

The fourth proportional to 13,279.71, 18,323.49 and 8,245.15 is: 11,376.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.71 : 18,323.49 = 8,245.15 : x
  2. Step 2: Convert to fraction form
    13,279.71/18,323.49 = 8,245.15/x
  3. Step 3: Cross multiply
    13,279.71x = 18,323.49 × 8,245.15
  4. Step 4: Simplify right side
    13,279.71x = 151,079,923.57
  5. Step 5: Solve for x
    x = 151,079,923.57/13,279.71
  6. Step 6: Final answer
    x = 11,376.75

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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.