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Finding the Fourth Proportional to 18,663.91, 25,754.33 and 11,492.68

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Solution

The fourth proportional to 18,663.91, 25,754.33 and 11,492.68 is: 15,858.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.91 : 25,754.33 = 11,492.68 : x
  2. Step 2: Convert to fraction form
    18,663.91/25,754.33 = 11,492.68/x
  3. Step 3: Cross multiply
    18,663.91x = 25,754.33 × 11,492.68
  4. Step 4: Simplify right side
    18,663.91x = 295,986,151.46
  5. Step 5: Solve for x
    x = 295,986,151.46/18,663.91
  6. Step 6: Final answer
    x = 15,858.75

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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.