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Finding the Fourth Proportional to 18,916.29, 28,343.23 and 10,996.58

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Solution

The fourth proportional to 18,916.29, 28,343.23 and 10,996.58 is: 16,476.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.29 : 28,343.23 = 10,996.58 : x
  2. Step 2: Convert to fraction form
    18,916.29/28,343.23 = 10,996.58/x
  3. Step 3: Cross multiply
    18,916.29x = 28,343.23 × 10,996.58
  4. Step 4: Simplify right side
    18,916.29x = 311,678,639.52
  5. Step 5: Solve for x
    x = 311,678,639.52/18,916.29
  6. Step 6: Final answer
    x = 16,476.73

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1.5x scale

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.