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Finding the Fourth Proportional to 7,190.81, 10,786.15 and 1,853.97

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Solution

The fourth proportional to 7,190.81, 10,786.15 and 1,853.97 is: 2,780.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.81 : 10,786.15 = 1,853.97 : x
  2. Step 2: Convert to fraction form
    7,190.81/10,786.15 = 1,853.97/x
  3. Step 3: Cross multiply
    7,190.81x = 10,786.15 × 1,853.97
  4. Step 4: Simplify right side
    7,190.81x = 19,997,160.38
  5. Step 5: Solve for x
    x = 19,997,160.38/7,190.81
  6. Step 6: Final answer
    x = 2,780.93

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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.