Home / 21,311.32-29,409.84-11,751.56

Finding the Fourth Proportional to 21,311.32, 29,409.84 and 11,751.56

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Solution

The fourth proportional to 21,311.32, 29,409.84 and 11,751.56 is: 16,217.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.32 : 29,409.84 = 11,751.56 : x
  2. Step 2: Convert to fraction form
    21,311.32/29,409.84 = 11,751.56/x
  3. Step 3: Cross multiply
    21,311.32x = 29,409.84 × 11,751.56
  4. Step 4: Simplify right side
    21,311.32x = 345,611,499.35
  5. Step 5: Solve for x
    x = 345,611,499.35/21,311.32
  6. Step 6: Final answer
    x = 16,217.27

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1.5x scale

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.