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Finding the Fourth Proportional to 43,812.76, 65,765.92 and 18,865.16

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Solution

The fourth proportional to 43,812.76, 65,765.92 and 18,865.16 is: 28,317.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,812.76 : 65,765.92 = 18,865.16 : x
  2. Step 2: Convert to fraction form
    43,812.76/65,765.92 = 18,865.16/x
  3. Step 3: Cross multiply
    43,812.76x = 65,765.92 × 18,865.16
  4. Step 4: Simplify right side
    43,812.76x = 1,240,684,603.35
  5. Step 5: Solve for x
    x = 1,240,684,603.35/43,812.76
  6. Step 6: Final answer
    x = 28,317.88

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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.