Home / 11,985.72-17,979.66-3,220.44

Finding the Fourth Proportional to 11,985.72, 17,979.66 and 3,220.44

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Solution

The fourth proportional to 11,985.72, 17,979.66 and 3,220.44 is: 4,830.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.72 : 17,979.66 = 3,220.44 : x
  2. Step 2: Convert to fraction form
    11,985.72/17,979.66 = 3,220.44/x
  3. Step 3: Cross multiply
    11,985.72x = 17,979.66 × 3,220.44
  4. Step 4: Simplify right side
    11,985.72x = 57,902,416.25
  5. Step 5: Solve for x
    x = 57,902,416.25/11,985.72
  6. Step 6: Final answer
    x = 4,830.95

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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.