Home / 21,388.25-29,515.24-11,956.88

Finding the Fourth Proportional to 21,388.25, 29,515.24 and 11,956.88

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Solution

The fourth proportional to 21,388.25, 29,515.24 and 11,956.88 is: 16,500.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.25 : 29,515.24 = 11,956.88 : x
  2. Step 2: Convert to fraction form
    21,388.25/29,515.24 = 11,956.88/x
  3. Step 3: Cross multiply
    21,388.25x = 29,515.24 × 11,956.88
  4. Step 4: Simplify right side
    21,388.25x = 352,910,182.85
  5. Step 5: Solve for x
    x = 352,910,182.85/21,388.25
  6. Step 6: Final answer
    x = 16,500.19

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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.