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Finding the Fourth Proportional to 18,419.52, 27,621.16 and 5,268.90

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Solution

The fourth proportional to 18,419.52, 27,621.16 and 5,268.90 is: 7,901.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.52 : 27,621.16 = 5,268.90 : x
  2. Step 2: Convert to fraction form
    18,419.52/27,621.16 = 5,268.90/x
  3. Step 3: Cross multiply
    18,419.52x = 27,621.16 × 5,268.90
  4. Step 4: Simplify right side
    18,419.52x = 145,533,129.92
  5. Step 5: Solve for x
    x = 145,533,129.92/18,419.52
  6. Step 6: Final answer
    x = 7,901.03

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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.