Home / 21,180.76-29,229.74-11,621.54

Finding the Fourth Proportional to 21,180.76, 29,229.74 and 11,621.54

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Solution

The fourth proportional to 21,180.76, 29,229.74 and 11,621.54 is: 16,037.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.76 : 29,229.74 = 11,621.54 : x
  2. Step 2: Convert to fraction form
    21,180.76/29,229.74 = 11,621.54/x
  3. Step 3: Cross multiply
    21,180.76x = 29,229.74 × 11,621.54
  4. Step 4: Simplify right side
    21,180.76x = 339,694,592.60
  5. Step 5: Solve for x
    x = 339,694,592.60/21,180.76
  6. Step 6: Final answer
    x = 16,037.88

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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.