Home / 7,965.40-11,947.50-3,221.86

Finding the Fourth Proportional to 7,965.40, 11,947.50 and 3,221.86

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Solution

The fourth proportional to 7,965.40, 11,947.50 and 3,221.86 is: 4,832.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.40 : 11,947.50 = 3,221.86 : x
  2. Step 2: Convert to fraction form
    7,965.40/11,947.50 = 3,221.86/x
  3. Step 3: Cross multiply
    7,965.40x = 11,947.50 × 3,221.86
  4. Step 4: Simplify right side
    7,965.40x = 38,493,172.35
  5. Step 5: Solve for x
    x = 38,493,172.35/7,965.40
  6. Step 6: Final answer
    x = 4,832.55

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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.