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Finding the Fourth Proportional to 13,726.71, 18,942.92 and 7,439.09

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Solution

The fourth proportional to 13,726.71, 18,942.92 and 7,439.09 is: 10,265.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,726.71 : 18,942.92 = 7,439.09 : x
  2. Step 2: Convert to fraction form
    13,726.71/18,942.92 = 7,439.09/x
  3. Step 3: Cross multiply
    13,726.71x = 18,942.92 × 7,439.09
  4. Step 4: Simplify right side
    13,726.71x = 140,917,954.83
  5. Step 5: Solve for x
    x = 140,917,954.83/13,726.71
  6. Step 6: Final answer
    x = 10,265.97

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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.