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Finding the Fourth Proportional to 18,753.52, 25,891.08 and 11,689.51

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Solution

The fourth proportional to 18,753.52, 25,891.08 and 11,689.51 is: 16,138.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.52 : 25,891.08 = 11,689.51 : x
  2. Step 2: Convert to fraction form
    18,753.52/25,891.08 = 11,689.51/x
  3. Step 3: Cross multiply
    18,753.52x = 25,891.08 × 11,689.51
  4. Step 4: Simplify right side
    18,753.52x = 302,653,909.12
  5. Step 5: Solve for x
    x = 302,653,909.12/18,753.52
  6. Step 6: Final answer
    x = 16,138.52

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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.