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Finding the Fourth Proportional to 13,691.92, 18,899.96 and 10,661.04

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Solution

The fourth proportional to 13,691.92, 18,899.96 and 10,661.04 is: 14,716.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.92 : 18,899.96 = 10,661.04 : x
  2. Step 2: Convert to fraction form
    13,691.92/18,899.96 = 10,661.04/x
  3. Step 3: Cross multiply
    13,691.92x = 18,899.96 × 10,661.04
  4. Step 4: Simplify right side
    13,691.92x = 201,493,229.56
  5. Step 5: Solve for x
    x = 201,493,229.56/13,691.92
  6. Step 6: Final answer
    x = 14,716.21

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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.