Home / 20,805.62-31,213.89-7,479.96

Finding the Fourth Proportional to 20,805.62, 31,213.89 and 7,479.96

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Solution

The fourth proportional to 20,805.62, 31,213.89 and 7,479.96 is: 11,221.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.62 : 31,213.89 = 7,479.96 : x
  2. Step 2: Convert to fraction form
    20,805.62/31,213.89 = 7,479.96/x
  3. Step 3: Cross multiply
    20,805.62x = 31,213.89 × 7,479.96
  4. Step 4: Simplify right side
    20,805.62x = 233,478,648.64
  5. Step 5: Solve for x
    x = 233,478,648.64/20,805.62
  6. Step 6: Final answer
    x = 11,221.90

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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.