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Finding the Fourth Proportional to 8,491.65, 12,729.27 and 2,940.83

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Solution

The fourth proportional to 8,491.65, 12,729.27 and 2,940.83 is: 4,408.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.65 : 12,729.27 = 2,940.83 : x
  2. Step 2: Convert to fraction form
    8,491.65/12,729.27 = 2,940.83/x
  3. Step 3: Cross multiply
    8,491.65x = 12,729.27 × 2,940.83
  4. Step 4: Simplify right side
    8,491.65x = 37,434,555.45
  5. Step 5: Solve for x
    x = 37,434,555.45/8,491.65
  6. Step 6: Final answer
    x = 4,408.40

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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.