Home / 13,213.10-18,234.91-8,728.99

Finding the Fourth Proportional to 13,213.10, 18,234.91 and 8,728.99

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Solution

The fourth proportional to 13,213.10, 18,234.91 and 8,728.99 is: 12,046.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.10 : 18,234.91 = 8,728.99 : x
  2. Step 2: Convert to fraction form
    13,213.10/18,234.91 = 8,728.99/x
  3. Step 3: Cross multiply
    13,213.10x = 18,234.91 × 8,728.99
  4. Step 4: Simplify right side
    13,213.10x = 159,172,388.20
  5. Step 5: Solve for x
    x = 159,172,388.20/13,213.10
  6. Step 6: Final answer
    x = 12,046.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.