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Finding the Fourth Proportional to 18,420.42, 27,643.39 and 7,325.97

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Solution

The fourth proportional to 18,420.42, 27,643.39 and 7,325.97 is: 10,994.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.42 : 27,643.39 = 7,325.97 : x
  2. Step 2: Convert to fraction form
    18,420.42/27,643.39 = 7,325.97/x
  3. Step 3: Cross multiply
    18,420.42x = 27,643.39 × 7,325.97
  4. Step 4: Simplify right side
    18,420.42x = 202,514,645.84
  5. Step 5: Solve for x
    x = 202,514,645.84/18,420.42
  6. Step 6: Final answer
    x = 10,994.03

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.