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Finding the Fourth Proportional to 8,411.92, 12,619.37 and 3,478.80

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Solution

The fourth proportional to 8,411.92, 12,619.37 and 3,478.80 is: 5,218.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,411.92 : 12,619.37 = 3,478.80 : x
  2. Step 2: Convert to fraction form
    8,411.92/12,619.37 = 3,478.80/x
  3. Step 3: Cross multiply
    8,411.92x = 12,619.37 × 3,478.80
  4. Step 4: Simplify right side
    8,411.92x = 43,900,264.36
  5. Step 5: Solve for x
    x = 43,900,264.36/8,411.92
  6. Step 6: Final answer
    x = 5,218.82

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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.