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Finding the Fourth Proportional to 13,818.68, 20,728.14 and 8,568.97

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Solution

The fourth proportional to 13,818.68, 20,728.14 and 8,568.97 is: 12,853.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.68 : 20,728.14 = 8,568.97 : x
  2. Step 2: Convert to fraction form
    13,818.68/20,728.14 = 8,568.97/x
  3. Step 3: Cross multiply
    13,818.68x = 20,728.14 × 8,568.97
  4. Step 4: Simplify right side
    13,818.68x = 177,618,725.86
  5. Step 5: Solve for x
    x = 177,618,725.86/13,818.68
  6. Step 6: Final answer
    x = 12,853.52

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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.