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Finding the Fourth Proportional to 18,636.99, 27,956.66 and 7,543.47

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Solution

The fourth proportional to 18,636.99, 27,956.66 and 7,543.47 is: 11,315.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.99 : 27,956.66 = 7,543.47 : x
  2. Step 2: Convert to fraction form
    18,636.99/27,956.66 = 7,543.47/x
  3. Step 3: Cross multiply
    18,636.99x = 27,956.66 × 7,543.47
  4. Step 4: Simplify right side
    18,636.99x = 210,890,226.01
  5. Step 5: Solve for x
    x = 210,890,226.01/18,636.99
  6. Step 6: Final answer
    x = 11,315.68

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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.