Home / 21,021.80-29,010.31-11,461.61

Finding the Fourth Proportional to 21,021.80, 29,010.31 and 11,461.61

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Solution

The fourth proportional to 21,021.80, 29,010.31 and 11,461.61 is: 15,817.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.80 : 29,010.31 = 11,461.61 : x
  2. Step 2: Convert to fraction form
    21,021.80/29,010.31 = 11,461.61/x
  3. Step 3: Cross multiply
    21,021.80x = 29,010.31 × 11,461.61
  4. Step 4: Simplify right side
    21,021.80x = 332,504,699.26
  5. Step 5: Solve for x
    x = 332,504,699.26/21,021.80
  6. Step 6: Final answer
    x = 15,817.14

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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.