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Finding the Fourth Proportional to 21,888, 30,206.08 and 11,952.64

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Solution

The fourth proportional to 21,888, 30,206.08 and 11,952.64 is: 16,494.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888 : 30,206.08 = 11,952.64 : x
  2. Step 2: Convert to fraction form
    21,888/30,206.08 = 11,952.64/x
  3. Step 3: Cross multiply
    21,888x = 30,206.08 × 11,952.64
  4. Step 4: Simplify right side
    21,888x = 361,042,400.05
  5. Step 5: Solve for x
    x = 361,042,400.05/21,888
  6. Step 6: Final answer
    x = 16,494.99

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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.