Home / 21,313.89-29,412.09-11,755.44

Finding the Fourth Proportional to 21,313.89, 29,412.09 and 11,755.44

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Solution

The fourth proportional to 21,313.89, 29,412.09 and 11,755.44 is: 16,221.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,313.89 : 29,412.09 = 11,755.44 : x
  2. Step 2: Convert to fraction form
    21,313.89/29,412.09 = 11,755.44/x
  3. Step 3: Cross multiply
    21,313.89x = 29,412.09 × 11,755.44
  4. Step 4: Simplify right side
    21,313.89x = 345,752,059.27
  5. Step 5: Solve for x
    x = 345,752,059.27/21,313.89
  6. Step 6: Final answer
    x = 16,221.91

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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.