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Finding the Fourth Proportional to 13,727, 18,940.92 and 7,758.20

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Solution

The fourth proportional to 13,727, 18,940.92 and 7,758.20 is: 10,704.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,727 : 18,940.92 = 7,758.20 : x
  2. Step 2: Convert to fraction form
    13,727/18,940.92 = 7,758.20/x
  3. Step 3: Cross multiply
    13,727x = 18,940.92 × 7,758.20
  4. Step 4: Simplify right side
    13,727x = 146,947,445.54
  5. Step 5: Solve for x
    x = 146,947,445.54/13,727
  6. Step 6: Final answer
    x = 10,704.99

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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.