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Finding the Fourth Proportional to 19,187, 28,779.18 and 11,792.60

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Solution

The fourth proportional to 19,187, 28,779.18 and 11,792.60 is: 17,688.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,187 : 28,779.18 = 11,792.60 : x
  2. Step 2: Convert to fraction form
    19,187/28,779.18 = 11,792.60/x
  3. Step 3: Cross multiply
    19,187x = 28,779.18 × 11,792.60
  4. Step 4: Simplify right side
    19,187x = 339,381,358.07
  5. Step 5: Solve for x
    x = 339,381,358.07/19,187
  6. Step 6: Final answer
    x = 17,688.09

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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.