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Finding the Fourth Proportional to 8,605.96, 12,903.18 and 3,986.44

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Solution

The fourth proportional to 8,605.96, 12,903.18 and 3,986.44 is: 5,976.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.96 : 12,903.18 = 3,986.44 : x
  2. Step 2: Convert to fraction form
    8,605.96/12,903.18 = 3,986.44/x
  3. Step 3: Cross multiply
    8,605.96x = 12,903.18 × 3,986.44
  4. Step 4: Simplify right side
    8,605.96x = 51,437,752.88
  5. Step 5: Solve for x
    x = 51,437,752.88/8,605.96
  6. Step 6: Final answer
    x = 5,976.99

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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.