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Finding the Fourth Proportional to 8,169.65, 12,251.79 and 2,621.68

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Solution

The fourth proportional to 8,169.65, 12,251.79 and 2,621.68 is: 3,931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,169.65 : 12,251.79 = 2,621.68 : x
  2. Step 2: Convert to fraction form
    8,169.65/12,251.79 = 2,621.68/x
  3. Step 3: Cross multiply
    8,169.65x = 12,251.79 × 2,621.68
  4. Step 4: Simplify right side
    8,169.65x = 32,120,242.18
  5. Step 5: Solve for x
    x = 32,120,242.18/8,169.65
  6. Step 6: Final answer
    x = 3,931.66

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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.