Home / 13,321.88-18,389.58-8,021.24

Finding the Fourth Proportional to 13,321.88, 18,389.58 and 8,021.24

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Solution

The fourth proportional to 13,321.88, 18,389.58 and 8,021.24 is: 11,072.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.88 : 18,389.58 = 8,021.24 : x
  2. Step 2: Convert to fraction form
    13,321.88/18,389.58 = 8,021.24/x
  3. Step 3: Cross multiply
    13,321.88x = 18,389.58 × 8,021.24
  4. Step 4: Simplify right side
    13,321.88x = 147,507,234.68
  5. Step 5: Solve for x
    x = 147,507,234.68/13,321.88
  6. Step 6: Final answer
    x = 11,072.55

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Double scale
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Similar ratio
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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.