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Finding the Fourth Proportional to 18,792.59, 28,193.22 and 5,645.21

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Solution

The fourth proportional to 18,792.59, 28,193.22 and 5,645.21 is: 8,469.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.59 : 28,193.22 = 5,645.21 : x
  2. Step 2: Convert to fraction form
    18,792.59/28,193.22 = 5,645.21/x
  3. Step 3: Cross multiply
    18,792.59x = 28,193.22 × 5,645.21
  4. Step 4: Simplify right side
    18,792.59x = 159,156,506.51
  5. Step 5: Solve for x
    x = 159,156,506.51/18,792.59
  6. Step 6: Final answer
    x = 8,469.11

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.