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Finding the Fourth Proportional to 16,383.81, 22,609.61 and 8,931.81

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Solution

The fourth proportional to 16,383.81, 22,609.61 and 8,931.81 is: 12,325.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,383.81 : 22,609.61 = 8,931.81 : x
  2. Step 2: Convert to fraction form
    16,383.81/22,609.61 = 8,931.81/x
  3. Step 3: Cross multiply
    16,383.81x = 22,609.61 × 8,931.81
  4. Step 4: Simplify right side
    16,383.81x = 201,944,696.04
  5. Step 5: Solve for x
    x = 201,944,696.04/16,383.81
  6. Step 6: Final answer
    x = 12,325.87

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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.