Home / 21,385.75-29,512.34-11,956.27

Finding the Fourth Proportional to 21,385.75, 29,512.34 and 11,956.27

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Solution

The fourth proportional to 21,385.75, 29,512.34 and 11,956.27 is: 16,499.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.75 : 29,512.34 = 11,956.27 : x
  2. Step 2: Convert to fraction form
    21,385.75/29,512.34 = 11,956.27/x
  3. Step 3: Cross multiply
    21,385.75x = 29,512.34 × 11,956.27
  4. Step 4: Simplify right side
    21,385.75x = 352,857,505.37
  5. Step 5: Solve for x
    x = 352,857,505.37/21,385.75
  6. Step 6: Final answer
    x = 16,499.66

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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.