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Finding the Fourth Proportional to 20,166.68, 27,828.87 and 11,213.99

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Solution

The fourth proportional to 20,166.68, 27,828.87 and 11,213.99 is: 15,474.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,166.68 : 27,828.87 = 11,213.99 : x
  2. Step 2: Convert to fraction form
    20,166.68/27,828.87 = 11,213.99/x
  3. Step 3: Cross multiply
    20,166.68x = 27,828.87 × 11,213.99
  4. Step 4: Simplify right side
    20,166.68x = 312,072,729.34
  5. Step 5: Solve for x
    x = 312,072,729.34/20,166.68
  6. Step 6: Final answer
    x = 15,474.67

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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.