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Finding the Fourth Proportional to 18,626.60, 27,931.08 and 6,772.10

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Solution

The fourth proportional to 18,626.60, 27,931.08 and 6,772.10 is: 10,154.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,626.60 : 27,931.08 = 6,772.10 : x
  2. Step 2: Convert to fraction form
    18,626.60/27,931.08 = 6,772.10/x
  3. Step 3: Cross multiply
    18,626.60x = 27,931.08 × 6,772.10
  4. Step 4: Simplify right side
    18,626.60x = 189,152,066.87
  5. Step 5: Solve for x
    x = 189,152,066.87/18,626.60
  6. Step 6: Final answer
    x = 10,154.94

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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.