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Finding the Fourth Proportional to 20,158.11, 27,817.02 and 11,205.09

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Solution

The fourth proportional to 20,158.11, 27,817.02 and 11,205.09 is: 15,462.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,158.11 : 27,817.02 = 11,205.09 : x
  2. Step 2: Convert to fraction form
    20,158.11/27,817.02 = 11,205.09/x
  3. Step 3: Cross multiply
    20,158.11x = 27,817.02 × 11,205.09
  4. Step 4: Simplify right side
    20,158.11x = 311,692,212.63
  5. Step 5: Solve for x
    x = 311,692,212.63/20,158.11
  6. Step 6: Final answer
    x = 15,462.37

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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.