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Finding the Fourth Proportional to 13,672.94, 18,865.34 and 7,704.62

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Solution

The fourth proportional to 13,672.94, 18,865.34 and 7,704.62 is: 10,630.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.94 : 18,865.34 = 7,704.62 : x
  2. Step 2: Convert to fraction form
    13,672.94/18,865.34 = 7,704.62/x
  3. Step 3: Cross multiply
    13,672.94x = 18,865.34 × 7,704.62
  4. Step 4: Simplify right side
    13,672.94x = 145,350,275.87
  5. Step 5: Solve for x
    x = 145,350,275.87/13,672.94
  6. Step 6: Final answer
    x = 10,630.51

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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.