Home / 11,987.20-17,979.07-3,664.99

Finding the Fourth Proportional to 11,987.20, 17,979.07 and 3,664.99

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Solution

The fourth proportional to 11,987.20, 17,979.07 and 3,664.99 is: 5,496.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.20 : 17,979.07 = 3,664.99 : x
  2. Step 2: Convert to fraction form
    11,987.20/17,979.07 = 3,664.99/x
  3. Step 3: Cross multiply
    11,987.20x = 17,979.07 × 3,664.99
  4. Step 4: Simplify right side
    11,987.20x = 65,893,111.76
  5. Step 5: Solve for x
    x = 65,893,111.76/11,987.20
  6. Step 6: Final answer
    x = 5,496.96

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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.