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Finding the Fourth Proportional to 8,491.85, 12,729.90 and 3,225.27

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Solution

The fourth proportional to 8,491.85, 12,729.90 and 3,225.27 is: 4,834.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.85 : 12,729.90 = 3,225.27 : x
  2. Step 2: Convert to fraction form
    8,491.85/12,729.90 = 3,225.27/x
  3. Step 3: Cross multiply
    8,491.85x = 12,729.90 × 3,225.27
  4. Step 4: Simplify right side
    8,491.85x = 41,057,364.57
  5. Step 5: Solve for x
    x = 41,057,364.57/8,491.85
  6. Step 6: Final answer
    x = 4,834.92

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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.