Home / 11,988.57-17,990.85-4,197.39

Finding the Fourth Proportional to 11,988.57, 17,990.85 and 4,197.39

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Solution

The fourth proportional to 11,988.57, 17,990.85 and 4,197.39 is: 6,298.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.57 : 17,990.85 = 4,197.39 : x
  2. Step 2: Convert to fraction form
    11,988.57/17,990.85 = 4,197.39/x
  3. Step 3: Cross multiply
    11,988.57x = 17,990.85 × 4,197.39
  4. Step 4: Simplify right side
    11,988.57x = 75,514,613.88
  5. Step 5: Solve for x
    x = 75,514,613.88/11,988.57
  6. Step 6: Final answer
    x = 6,298.88

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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.