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Finding the Fourth Proportional to 20,172.87, 30,177.90 and 18,072.14

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Solution

The fourth proportional to 20,172.87, 30,177.90 and 18,072.14 is: 27,035.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.87 : 30,177.90 = 18,072.14 : x
  2. Step 2: Convert to fraction form
    20,172.87/30,177.90 = 18,072.14/x
  3. Step 3: Cross multiply
    20,172.87x = 30,177.90 × 18,072.14
  4. Step 4: Simplify right side
    20,172.87x = 545,379,082.82
  5. Step 5: Solve for x
    x = 545,379,082.82/20,172.87
  6. Step 6: Final answer
    x = 27,035.27

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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.