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Finding the Fourth Proportional to 12,162.75, 16,787.04 and 6,857.67

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Solution

The fourth proportional to 12,162.75, 16,787.04 and 6,857.67 is: 9,464.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,162.75 : 16,787.04 = 6,857.67 : x
  2. Step 2: Convert to fraction form
    12,162.75/16,787.04 = 6,857.67/x
  3. Step 3: Cross multiply
    12,162.75x = 16,787.04 × 6,857.67
  4. Step 4: Simplify right side
    12,162.75x = 115,119,980.60
  5. Step 5: Solve for x
    x = 115,119,980.60/12,162.75
  6. Step 6: Final answer
    x = 9,464.96

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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.