Home / 21,405.58-29,542.68-11,974.78

Finding the Fourth Proportional to 21,405.58, 29,542.68 and 11,974.78

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Solution

The fourth proportional to 21,405.58, 29,542.68 and 11,974.78 is: 16,526.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.58 : 29,542.68 = 11,974.78 : x
  2. Step 2: Convert to fraction form
    21,405.58/29,542.68 = 11,974.78/x
  3. Step 3: Cross multiply
    21,405.58x = 29,542.68 × 11,974.78
  4. Step 4: Simplify right side
    21,405.58x = 353,767,093.61
  5. Step 5: Solve for x
    x = 353,767,093.61/21,405.58
  6. Step 6: Final answer
    x = 16,526.86

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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.