Home / 7,912.45-10,919.40-4,375.79

Finding the Fourth Proportional to 7,912.45, 10,919.40 and 4,375.79

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Solution

The fourth proportional to 7,912.45, 10,919.40 and 4,375.79 is: 6,038.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.45 : 10,919.40 = 4,375.79 : x
  2. Step 2: Convert to fraction form
    7,912.45/10,919.40 = 4,375.79/x
  3. Step 3: Cross multiply
    7,912.45x = 10,919.40 × 4,375.79
  4. Step 4: Simplify right side
    7,912.45x = 47,781,001.33
  5. Step 5: Solve for x
    x = 47,781,001.33/7,912.45
  6. Step 6: Final answer
    x = 6,038.71

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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.