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Finding the Fourth Proportional to 11,190.78, 16,691.19 and 10,993.98

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Solution

The fourth proportional to 11,190.78, 16,691.19 and 10,993.98 is: 16,397.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,190.78 : 16,691.19 = 10,993.98 : x
  2. Step 2: Convert to fraction form
    11,190.78/16,691.19 = 10,993.98/x
  3. Step 3: Cross multiply
    11,190.78x = 16,691.19 × 10,993.98
  4. Step 4: Simplify right side
    11,190.78x = 183,502,609.04
  5. Step 5: Solve for x
    x = 183,502,609.04/11,190.78
  6. Step 6: Final answer
    x = 16,397.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.