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Finding the Fourth Proportional to 18,767.12, 25,892.04 and 11,687.68

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Solution

The fourth proportional to 18,767.12, 25,892.04 and 11,687.68 is: 16,124.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,767.12 : 25,892.04 = 11,687.68 : x
  2. Step 2: Convert to fraction form
    18,767.12/25,892.04 = 11,687.68/x
  3. Step 3: Cross multiply
    18,767.12x = 25,892.04 × 11,687.68
  4. Step 4: Simplify right side
    18,767.12x = 302,617,878.07
  5. Step 5: Solve for x
    x = 302,617,878.07/18,767.12
  6. Step 6: Final answer
    x = 16,124.90

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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.