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Finding the Fourth Proportional to 9,267.68, 12,789 and 5,731.28

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Solution

The fourth proportional to 9,267.68, 12,789 and 5,731.28 is: 7,908.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,267.68 : 12,789 = 5,731.28 : x
  2. Step 2: Convert to fraction form
    9,267.68/12,789 = 5,731.28/x
  3. Step 3: Cross multiply
    9,267.68x = 12,789 × 5,731.28
  4. Step 4: Simplify right side
    9,267.68x = 73,297,339.92
  5. Step 5: Solve for x
    x = 73,297,339.92/9,267.68
  6. Step 6: Final answer
    x = 7,908.92

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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.