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Finding the Fourth Proportional to 20,186.88, 27,843 and 13,901.28

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Solution

The fourth proportional to 20,186.88, 27,843 and 13,901.28 is: 19,173.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.88 : 27,843 = 13,901.28 : x
  2. Step 2: Convert to fraction form
    20,186.88/27,843 = 13,901.28/x
  3. Step 3: Cross multiply
    20,186.88x = 27,843 × 13,901.28
  4. Step 4: Simplify right side
    20,186.88x = 387,053,339.04
  5. Step 5: Solve for x
    x = 387,053,339.04/20,186.88
  6. Step 6: Final answer
    x = 19,173.51

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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.