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Finding the Fourth Proportional to 19,651.68, 27,118.98 and 11,153.88

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Solution

The fourth proportional to 19,651.68, 27,118.98 and 11,153.88 is: 15,392.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,651.68 : 27,118.98 = 11,153.88 : x
  2. Step 2: Convert to fraction form
    19,651.68/27,118.98 = 11,153.88/x
  3. Step 3: Cross multiply
    19,651.68x = 27,118.98 × 11,153.88
  4. Step 4: Simplify right side
    19,651.68x = 302,481,848.64
  5. Step 5: Solve for x
    x = 302,481,848.64/19,651.68
  6. Step 6: Final answer
    x = 15,392.16

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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.