Home / 7,099.12-10,648.38-1,905

Finding the Fourth Proportional to 7,099.12, 10,648.38 and 1,905

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Solution

The fourth proportional to 7,099.12, 10,648.38 and 1,905 is: 2,857.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,099.12 : 10,648.38 = 1,905 : x
  2. Step 2: Convert to fraction form
    7,099.12/10,648.38 = 1,905/x
  3. Step 3: Cross multiply
    7,099.12x = 10,648.38 × 1,905
  4. Step 4: Simplify right side
    7,099.12x = 20,285,163.90
  5. Step 5: Solve for x
    x = 20,285,163.90/7,099.12
  6. Step 6: Final answer
    x = 2,857.42

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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.