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Finding the Fourth Proportional to 13,682.88, 18,880.98 and 7,713.96

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Solution

The fourth proportional to 13,682.88, 18,880.98 and 7,713.96 is: 10,644.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,682.88 : 18,880.98 = 7,713.96 : x
  2. Step 2: Convert to fraction form
    13,682.88/18,880.98 = 7,713.96/x
  3. Step 3: Cross multiply
    13,682.88x = 18,880.98 × 7,713.96
  4. Step 4: Simplify right side
    13,682.88x = 145,647,124.48
  5. Step 5: Solve for x
    x = 145,647,124.48/13,682.88
  6. Step 6: Final answer
    x = 10,644.48

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1.5x scale

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.