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Finding the Fourth Proportional to 18,443.42, 27,615.95 and 9,659.91

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Solution

The fourth proportional to 18,443.42, 27,615.95 and 9,659.91 is: 14,464.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,443.42 : 27,615.95 = 9,659.91 : x
  2. Step 2: Convert to fraction form
    18,443.42/27,615.95 = 9,659.91/x
  3. Step 3: Cross multiply
    18,443.42x = 27,615.95 × 9,659.91
  4. Step 4: Simplify right side
    18,443.42x = 266,767,591.56
  5. Step 5: Solve for x
    x = 266,767,591.56/18,443.42
  6. Step 6: Final answer
    x = 14,464.11

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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.