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Finding the Fourth Proportional to 18,672.76, 25,770.18 and 10,716.76

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Solution

The fourth proportional to 18,672.76, 25,770.18 and 10,716.76 is: 14,790.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.76 : 25,770.18 = 10,716.76 : x
  2. Step 2: Convert to fraction form
    18,672.76/25,770.18 = 10,716.76/x
  3. Step 3: Cross multiply
    18,672.76x = 25,770.18 × 10,716.76
  4. Step 4: Simplify right side
    18,672.76x = 276,172,834.22
  5. Step 5: Solve for x
    x = 276,172,834.22/18,672.76
  6. Step 6: Final answer
    x = 14,790.15

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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.