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Finding the Fourth Proportional to 8,455.65, 12,684.03 and 2,215.82

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Solution

The fourth proportional to 8,455.65, 12,684.03 and 2,215.82 is: 3,323.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.65 : 12,684.03 = 2,215.82 : x
  2. Step 2: Convert to fraction form
    8,455.65/12,684.03 = 2,215.82/x
  3. Step 3: Cross multiply
    8,455.65x = 12,684.03 × 2,215.82
  4. Step 4: Simplify right side
    8,455.65x = 28,105,463.93
  5. Step 5: Solve for x
    x = 28,105,463.93/8,455.65
  6. Step 6: Final answer
    x = 3,323.87

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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.