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Finding the Fourth Proportional to 7,819.53, 11,720.79 and 2,885.01

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Solution

The fourth proportional to 7,819.53, 11,720.79 and 2,885.01 is: 4,324.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.53 : 11,720.79 = 2,885.01 : x
  2. Step 2: Convert to fraction form
    7,819.53/11,720.79 = 2,885.01/x
  3. Step 3: Cross multiply
    7,819.53x = 11,720.79 × 2,885.01
  4. Step 4: Simplify right side
    7,819.53x = 33,814,596.36
  5. Step 5: Solve for x
    x = 33,814,596.36/7,819.53
  6. Step 6: Final answer
    x = 4,324.38

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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.