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Finding the Fourth Proportional to 18,548.49, 27,821.52 and 8,689.98

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Solution

The fourth proportional to 18,548.49, 27,821.52 and 8,689.98 is: 13,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,548.49 : 27,821.52 = 8,689.98 : x
  2. Step 2: Convert to fraction form
    18,548.49/27,821.52 = 8,689.98/x
  3. Step 3: Cross multiply
    18,548.49x = 27,821.52 × 8,689.98
  4. Step 4: Simplify right side
    18,548.49x = 241,768,452.37
  5. Step 5: Solve for x
    x = 241,768,452.37/18,548.49
  6. Step 6: Final answer
    x = 13,034.40

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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.