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Finding the Fourth Proportional to 18,699.70, 25,792.37 and 11,140.20

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Solution

The fourth proportional to 18,699.70, 25,792.37 and 11,140.20 is: 15,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.70 : 25,792.37 = 11,140.20 : x
  2. Step 2: Convert to fraction form
    18,699.70/25,792.37 = 11,140.20/x
  3. Step 3: Cross multiply
    18,699.70x = 25,792.37 × 11,140.20
  4. Step 4: Simplify right side
    18,699.70x = 287,332,100.20
  5. Step 5: Solve for x
    x = 287,332,100.20/18,699.70
  6. Step 6: Final answer
    x = 15,365.60

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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.