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Finding the Fourth Proportional to 13,759.96, 18,989.48 and 7,791.88

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Solution

The fourth proportional to 13,759.96, 18,989.48 and 7,791.88 is: 10,753.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.96 : 18,989.48 = 7,791.88 : x
  2. Step 2: Convert to fraction form
    13,759.96/18,989.48 = 7,791.88/x
  3. Step 3: Cross multiply
    13,759.96x = 18,989.48 × 7,791.88
  4. Step 4: Simplify right side
    13,759.96x = 147,963,749.42
  5. Step 5: Solve for x
    x = 147,963,749.42/13,759.96
  6. Step 6: Final answer
    x = 10,753.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.