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Finding the Fourth Proportional to 18,990.23, 26,206.78 and 10,492.54

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Solution

The fourth proportional to 18,990.23, 26,206.78 and 10,492.54 is: 14,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.23 : 26,206.78 = 10,492.54 : x
  2. Step 2: Convert to fraction form
    18,990.23/26,206.78 = 10,492.54/x
  3. Step 3: Cross multiply
    18,990.23x = 26,206.78 × 10,492.54
  4. Step 4: Simplify right side
    18,990.23x = 274,975,687.42
  5. Step 5: Solve for x
    x = 274,975,687.42/18,990.23
  6. Step 6: Final answer
    x = 14,479.85

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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.