Home / 12,213.75-18,320.64-2,979.75

Finding the Fourth Proportional to 12,213.75, 18,320.64 and 2,979.75

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Solution

The fourth proportional to 12,213.75, 18,320.64 and 2,979.75 is: 4,469.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.75 : 18,320.64 = 2,979.75 : x
  2. Step 2: Convert to fraction form
    12,213.75/18,320.64 = 2,979.75/x
  3. Step 3: Cross multiply
    12,213.75x = 18,320.64 × 2,979.75
  4. Step 4: Simplify right side
    12,213.75x = 54,590,927.04
  5. Step 5: Solve for x
    x = 54,590,927.04/12,213.75
  6. Step 6: Final answer
    x = 4,469.63

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Similar ratio
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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.