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Finding the Fourth Proportional to 19,697.05, 27,191.12 and 12,627.51

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Solution

The fourth proportional to 19,697.05, 27,191.12 and 12,627.51 is: 17,431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,697.05 : 27,191.12 = 12,627.51 : x
  2. Step 2: Convert to fraction form
    19,697.05/27,191.12 = 12,627.51/x
  3. Step 3: Cross multiply
    19,697.05x = 27,191.12 × 12,627.51
  4. Step 4: Simplify right side
    19,697.05x = 343,356,139.71
  5. Step 5: Solve for x
    x = 343,356,139.71/19,697.05
  6. Step 6: Final answer
    x = 17,431.86

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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.