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Finding the Fourth Proportional to 13,609.97, 20,397.02 and 12,722.11

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Solution

The fourth proportional to 13,609.97, 20,397.02 and 12,722.11 is: 19,066.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.97 : 20,397.02 = 12,722.11 : x
  2. Step 2: Convert to fraction form
    13,609.97/20,397.02 = 12,722.11/x
  3. Step 3: Cross multiply
    13,609.97x = 20,397.02 × 12,722.11
  4. Step 4: Simplify right side
    13,609.97x = 259,493,112.92
  5. Step 5: Solve for x
    x = 259,493,112.92/13,609.97
  6. Step 6: Final answer
    x = 19,066.41

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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.