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Finding the Fourth Proportional to 20,322.66, 30,483.99 and 7,172.01

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Solution

The fourth proportional to 20,322.66, 30,483.99 and 7,172.01 is: 10,758.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,322.66 : 30,483.99 = 7,172.01 : x
  2. Step 2: Convert to fraction form
    20,322.66/30,483.99 = 7,172.01/x
  3. Step 3: Cross multiply
    20,322.66x = 30,483.99 × 7,172.01
  4. Step 4: Simplify right side
    20,322.66x = 218,631,481.12
  5. Step 5: Solve for x
    x = 218,631,481.12/20,322.66
  6. Step 6: Final answer
    x = 10,758.02

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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.