Home / 7,945.85-11,919.60-2,102.45

Finding the Fourth Proportional to 7,945.85, 11,919.60 and 2,102.45

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Solution

The fourth proportional to 7,945.85, 11,919.60 and 2,102.45 is: 3,153.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,945.85 : 11,919.60 = 2,102.45 : x
  2. Step 2: Convert to fraction form
    7,945.85/11,919.60 = 2,102.45/x
  3. Step 3: Cross multiply
    7,945.85x = 11,919.60 × 2,102.45
  4. Step 4: Simplify right side
    7,945.85x = 25,060,303.42
  5. Step 5: Solve for x
    x = 25,060,303.42/7,945.85
  6. Step 6: Final answer
    x = 3,153.88

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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.