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Finding the Fourth Proportional to 18,635.87, 27,953.80 and 12,774.71

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Solution

The fourth proportional to 18,635.87, 27,953.80 and 12,774.71 is: 19,162.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,635.87 : 27,953.80 = 12,774.71 : x
  2. Step 2: Convert to fraction form
    18,635.87/27,953.80 = 12,774.71/x
  3. Step 3: Cross multiply
    18,635.87x = 27,953.80 × 12,774.71
  4. Step 4: Simplify right side
    18,635.87x = 357,101,688.40
  5. Step 5: Solve for x
    x = 357,101,688.40/18,635.87
  6. Step 6: Final answer
    x = 19,162.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.