Home / 10,939.62-15,091.94-6,690.87

Finding the Fourth Proportional to 10,939.62, 15,091.94 and 6,690.87

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Solution

The fourth proportional to 10,939.62, 15,091.94 and 6,690.87 is: 9,230.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.62 : 15,091.94 = 6,690.87 : x
  2. Step 2: Convert to fraction form
    10,939.62/15,091.94 = 6,690.87/x
  3. Step 3: Cross multiply
    10,939.62x = 15,091.94 × 6,690.87
  4. Step 4: Simplify right side
    10,939.62x = 100,978,175.13
  5. Step 5: Solve for x
    x = 100,978,175.13/10,939.62
  6. Step 6: Final answer
    x = 9,230.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.