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Finding the Fourth Proportional to 11,998.80, 17,992.80 and 4,600.80

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Solution

The fourth proportional to 11,998.80, 17,992.80 and 4,600.80 is: 6,899.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,998.80 : 17,992.80 = 4,600.80 : x
  2. Step 2: Convert to fraction form
    11,998.80/17,992.80 = 4,600.80/x
  3. Step 3: Cross multiply
    11,998.80x = 17,992.80 × 4,600.80
  4. Step 4: Simplify right side
    11,998.80x = 82,781,274.24
  5. Step 5: Solve for x
    x = 82,781,274.24/11,998.80
  6. Step 6: Final answer
    x = 6,899.13

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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.