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Finding the Fourth Proportional to 15,243.21, 21,036.44 and 8,528.43

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Solution

The fourth proportional to 15,243.21, 21,036.44 and 8,528.43 is: 11,769.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,243.21 : 21,036.44 = 8,528.43 : x
  2. Step 2: Convert to fraction form
    15,243.21/21,036.44 = 8,528.43/x
  3. Step 3: Cross multiply
    15,243.21x = 21,036.44 × 8,528.43
  4. Step 4: Simplify right side
    15,243.21x = 179,407,805.99
  5. Step 5: Solve for x
    x = 179,407,805.99/15,243.21
  6. Step 6: Final answer
    x = 11,769.69

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.