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Finding the Fourth Proportional to 8,409.69, 12,596.31 and 5,479.11

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Solution

The fourth proportional to 8,409.69, 12,596.31 and 5,479.11 is: 8,206.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,409.69 : 12,596.31 = 5,479.11 : x
  2. Step 2: Convert to fraction form
    8,409.69/12,596.31 = 5,479.11/x
  3. Step 3: Cross multiply
    8,409.69x = 12,596.31 × 5,479.11
  4. Step 4: Simplify right side
    8,409.69x = 69,016,568.08
  5. Step 5: Solve for x
    x = 69,016,568.08/8,409.69
  6. Step 6: Final answer
    x = 8,206.79

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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.