Home / 21,180.49-29,229.62-11,620.79

Finding the Fourth Proportional to 21,180.49, 29,229.62 and 11,620.79

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Solution

The fourth proportional to 21,180.49, 29,229.62 and 11,620.79 is: 16,036.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.49 : 29,229.62 = 11,620.79 : x
  2. Step 2: Convert to fraction form
    21,180.49/29,229.62 = 11,620.79/x
  3. Step 3: Cross multiply
    21,180.49x = 29,229.62 × 11,620.79
  4. Step 4: Simplify right side
    21,180.49x = 339,671,100.60
  5. Step 5: Solve for x
    x = 339,671,100.60/21,180.49
  6. Step 6: Final answer
    x = 16,036.98

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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.