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Finding the Fourth Proportional to 7,995.90, 11,991.42 and 2,800.56

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Solution

The fourth proportional to 7,995.90, 11,991.42 and 2,800.56 is: 4,199.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,995.90 : 11,991.42 = 2,800.56 : x
  2. Step 2: Convert to fraction form
    7,995.90/11,991.42 = 2,800.56/x
  3. Step 3: Cross multiply
    7,995.90x = 11,991.42 × 2,800.56
  4. Step 4: Simplify right side
    7,995.90x = 33,582,691.20
  5. Step 5: Solve for x
    x = 33,582,691.20/7,995.90
  6. Step 6: Final answer
    x = 4,199.99

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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.