Home / 21,906.12-30,231.72-13,522.76

Finding the Fourth Proportional to 21,906.12, 30,231.72 and 13,522.76

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Solution

The fourth proportional to 21,906.12, 30,231.72 and 13,522.76 is: 18,662.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,906.12 : 30,231.72 = 13,522.76 : x
  2. Step 2: Convert to fraction form
    21,906.12/30,231.72 = 13,522.76/x
  3. Step 3: Cross multiply
    21,906.12x = 30,231.72 × 13,522.76
  4. Step 4: Simplify right side
    21,906.12x = 408,816,293.95
  5. Step 5: Solve for x
    x = 408,816,293.95/21,906.12
  6. Step 6: Final answer
    x = 18,662.20

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Half scale
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Double scale
Find fourth proportional to 21,907.12, 30,233.10 and 13,523.76
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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.