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Finding the Fourth Proportional to 19,891.23, 27,448.96 and 10,939.11

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Solution

The fourth proportional to 19,891.23, 27,448.96 and 10,939.11 is: 15,095.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.23 : 27,448.96 = 10,939.11 : x
  2. Step 2: Convert to fraction form
    19,891.23/27,448.96 = 10,939.11/x
  3. Step 3: Cross multiply
    19,891.23x = 27,448.96 × 10,939.11
  4. Step 4: Simplify right side
    19,891.23x = 300,267,192.83
  5. Step 5: Solve for x
    x = 300,267,192.83/19,891.23
  6. Step 6: Final answer
    x = 15,095.46

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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.