Home / 11,317.52-16,972.08-3,920

Finding the Fourth Proportional to 11,317.52, 16,972.08 and 3,920

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Solution

The fourth proportional to 11,317.52, 16,972.08 and 3,920 is: 5,878.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,317.52 : 16,972.08 = 3,920 : x
  2. Step 2: Convert to fraction form
    11,317.52/16,972.08 = 3,920/x
  3. Step 3: Cross multiply
    11,317.52x = 16,972.08 × 3,920
  4. Step 4: Simplify right side
    11,317.52x = 66,530,553.60
  5. Step 5: Solve for x
    x = 66,530,553.60/11,317.52
  6. Step 6: Final answer
    x = 5,878.55

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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.