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Finding the Fourth Proportional to 8,491.34, 12,723.99 and 3,558.28

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Solution

The fourth proportional to 8,491.34, 12,723.99 and 3,558.28 is: 5,331.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.34 : 12,723.99 = 3,558.28 : x
  2. Step 2: Convert to fraction form
    8,491.34/12,723.99 = 3,558.28/x
  3. Step 3: Cross multiply
    8,491.34x = 12,723.99 × 3,558.28
  4. Step 4: Simplify right side
    8,491.34x = 45,275,519.14
  5. Step 5: Solve for x
    x = 45,275,519.14/8,491.34
  6. Step 6: Final answer
    x = 5,331.96

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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.