Home / 21,180.96-29,229.21-11,620.80

Finding the Fourth Proportional to 21,180.96, 29,229.21 and 11,620.80

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Solution

The fourth proportional to 21,180.96, 29,229.21 and 11,620.80 is: 16,036.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.96 : 29,229.21 = 11,620.80 : x
  2. Step 2: Convert to fraction form
    21,180.96/29,229.21 = 11,620.80/x
  3. Step 3: Cross multiply
    21,180.96x = 29,229.21 × 11,620.80
  4. Step 4: Simplify right side
    21,180.96x = 339,666,803.57
  5. Step 5: Solve for x
    x = 339,666,803.57/21,180.96
  6. Step 6: Final answer
    x = 16,036.42

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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.