Home / 7,921.41-11,871.62-4,215.66

Finding the Fourth Proportional to 7,921.41, 11,871.62 and 4,215.66

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Solution

The fourth proportional to 7,921.41, 11,871.62 and 4,215.66 is: 6,317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.41 : 11,871.62 = 4,215.66 : x
  2. Step 2: Convert to fraction form
    7,921.41/11,871.62 = 4,215.66/x
  3. Step 3: Cross multiply
    7,921.41x = 11,871.62 × 4,215.66
  4. Step 4: Simplify right side
    7,921.41x = 50,046,692.49
  5. Step 5: Solve for x
    x = 50,046,692.49/7,921.41
  6. Step 6: Final answer
    x = 6,317.90

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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.