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Finding the Fourth Proportional to 8,600.50, 12,901.90 and 3,405.16

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Solution

The fourth proportional to 8,600.50, 12,901.90 and 3,405.16 is: 5,108.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,600.50 : 12,901.90 = 3,405.16 : x
  2. Step 2: Convert to fraction form
    8,600.50/12,901.90 = 3,405.16/x
  3. Step 3: Cross multiply
    8,600.50x = 12,901.90 × 3,405.16
  4. Step 4: Simplify right side
    8,600.50x = 43,933,033.80
  5. Step 5: Solve for x
    x = 43,933,033.80/8,600.50
  6. Step 6: Final answer
    x = 5,108.20

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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.