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Finding the Fourth Proportional to 18,813, 28,219.68 and 5,665.08

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Solution

The fourth proportional to 18,813, 28,219.68 and 5,665.08 is: 8,497.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813 : 28,219.68 = 5,665.08 : x
  2. Step 2: Convert to fraction form
    18,813/28,219.68 = 5,665.08/x
  3. Step 3: Cross multiply
    18,813x = 28,219.68 × 5,665.08
  4. Step 4: Simplify right side
    18,813x = 159,866,744.77
  5. Step 5: Solve for x
    x = 159,866,744.77/18,813
  6. Step 6: Final answer
    x = 8,497.67

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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.