Home / 21,311.45-29,408.15-11,751.32

Finding the Fourth Proportional to 21,311.45, 29,408.15 and 11,751.32

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Solution

The fourth proportional to 21,311.45, 29,408.15 and 11,751.32 is: 16,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.45 : 29,408.15 = 11,751.32 : x
  2. Step 2: Convert to fraction form
    21,311.45/29,408.15 = 11,751.32/x
  3. Step 3: Cross multiply
    21,311.45x = 29,408.15 × 11,751.32
  4. Step 4: Simplify right side
    21,311.45x = 345,584,463.60
  5. Step 5: Solve for x
    x = 345,584,463.60/21,311.45
  6. Step 6: Final answer
    x = 16,215.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.