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Finding the Fourth Proportional to 19,491.99, 29,213.42 and 8,385.81

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Solution

The fourth proportional to 19,491.99, 29,213.42 and 8,385.81 is: 12,568.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,491.99 : 29,213.42 = 8,385.81 : x
  2. Step 2: Convert to fraction form
    19,491.99/29,213.42 = 8,385.81/x
  3. Step 3: Cross multiply
    19,491.99x = 29,213.42 × 8,385.81
  4. Step 4: Simplify right side
    19,491.99x = 244,978,147.64
  5. Step 5: Solve for x
    x = 244,978,147.64/19,491.99
  6. Step 6: Final answer
    x = 12,568.14

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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.