Home / 11,986.72-17,981.16-3,221.44

Finding the Fourth Proportional to 11,986.72, 17,981.16 and 3,221.44

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Solution

The fourth proportional to 11,986.72, 17,981.16 and 3,221.44 is: 4,832.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.72 : 17,981.16 = 3,221.44 : x
  2. Step 2: Convert to fraction form
    11,986.72/17,981.16 = 3,221.44/x
  3. Step 3: Cross multiply
    11,986.72x = 17,981.16 × 3,221.44
  4. Step 4: Simplify right side
    11,986.72x = 57,925,228.07
  5. Step 5: Solve for x
    x = 57,925,228.07/11,986.72
  6. Step 6: Final answer
    x = 4,832.45

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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.