Home / 7,914.20-11,872.72-2,648.70

Finding the Fourth Proportional to 7,914.20, 11,872.72 and 2,648.70

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Solution

The fourth proportional to 7,914.20, 11,872.72 and 2,648.70 is: 3,973.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,914.20 : 11,872.72 = 2,648.70 : x
  2. Step 2: Convert to fraction form
    7,914.20/11,872.72 = 2,648.70/x
  3. Step 3: Cross multiply
    7,914.20x = 11,872.72 × 2,648.70
  4. Step 4: Simplify right side
    7,914.20x = 31,447,273.46
  5. Step 5: Solve for x
    x = 31,447,273.46/7,914.20
  6. Step 6: Final answer
    x = 3,973.53

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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.