Home / 21,279.24-29,361.24-11,847.78

Finding the Fourth Proportional to 21,279.24, 29,361.24 and 11,847.78

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Solution

The fourth proportional to 21,279.24, 29,361.24 and 11,847.78 is: 16,347.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.24 : 29,361.24 = 11,847.78 : x
  2. Step 2: Convert to fraction form
    21,279.24/29,361.24 = 11,847.78/x
  3. Step 3: Cross multiply
    21,279.24x = 29,361.24 × 11,847.78
  4. Step 4: Simplify right side
    21,279.24x = 347,865,512.05
  5. Step 5: Solve for x
    x = 347,865,512.05/21,279.24
  6. Step 6: Final answer
    x = 16,347.65

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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.