Home / 21,021.88-29,010.38-11,590.78

Finding the Fourth Proportional to 21,021.88, 29,010.38 and 11,590.78

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Solution

The fourth proportional to 21,021.88, 29,010.38 and 11,590.78 is: 15,995.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.88 : 29,010.38 = 11,590.78 : x
  2. Step 2: Convert to fraction form
    21,021.88/29,010.38 = 11,590.78/x
  3. Step 3: Cross multiply
    21,021.88x = 29,010.38 × 11,590.78
  4. Step 4: Simplify right side
    21,021.88x = 336,252,932.30
  5. Step 5: Solve for x
    x = 336,252,932.30/21,021.88
  6. Step 6: Final answer
    x = 15,995.38

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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.