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Finding the Fourth Proportional to 19,689, 27,183.12 and 12,627.72

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Solution

The fourth proportional to 19,689, 27,183.12 and 12,627.72 is: 17,434.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,689 : 27,183.12 = 12,627.72 : x
  2. Step 2: Convert to fraction form
    19,689/27,183.12 = 12,627.72/x
  3. Step 3: Cross multiply
    19,689x = 27,183.12 × 12,627.72
  4. Step 4: Simplify right side
    19,689x = 343,260,828.09
  5. Step 5: Solve for x
    x = 343,260,828.09/19,689
  6. Step 6: Final answer
    x = 17,434.14

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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.