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Finding the Fourth Proportional to 11,812.79, 17,719.20 and 11,091.08

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Solution

The fourth proportional to 11,812.79, 17,719.20 and 11,091.08 is: 16,636.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,812.79 : 17,719.20 = 11,091.08 : x
  2. Step 2: Convert to fraction form
    11,812.79/17,719.20 = 11,091.08/x
  3. Step 3: Cross multiply
    11,812.79x = 17,719.20 × 11,091.08
  4. Step 4: Simplify right side
    11,812.79x = 196,524,920.68
  5. Step 5: Solve for x
    x = 196,524,920.68/11,812.79
  6. Step 6: Final answer
    x = 16,636.63

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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.