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Finding the Fourth Proportional to 9,151.99, 12,628.10 and 7,891.73

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Solution

The fourth proportional to 9,151.99, 12,628.10 and 7,891.73 is: 10,889.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,151.99 : 12,628.10 = 7,891.73 : x
  2. Step 2: Convert to fraction form
    9,151.99/12,628.10 = 7,891.73/x
  3. Step 3: Cross multiply
    9,151.99x = 12,628.10 × 7,891.73
  4. Step 4: Simplify right side
    9,151.99x = 99,657,559.56
  5. Step 5: Solve for x
    x = 99,657,559.56/9,151.99
  6. Step 6: Final answer
    x = 10,889.17

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Similar ratio
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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.