Home / 11,987.78-17,981.67-4,194.80

Finding the Fourth Proportional to 11,987.78, 17,981.67 and 4,194.80

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Solution

The fourth proportional to 11,987.78, 17,981.67 and 4,194.80 is: 6,292.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.78 : 17,981.67 = 4,194.80 : x
  2. Step 2: Convert to fraction form
    11,987.78/17,981.67 = 4,194.80/x
  3. Step 3: Cross multiply
    11,987.78x = 17,981.67 × 4,194.80
  4. Step 4: Simplify right side
    11,987.78x = 75,429,509.32
  5. Step 5: Solve for x
    x = 75,429,509.32/11,987.78
  6. Step 6: Final answer
    x = 6,292.20

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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.