Home / 21,021.14-31,486.46-9,911.18

Finding the Fourth Proportional to 21,021.14, 31,486.46 and 9,911.18

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Solution

The fourth proportional to 21,021.14, 31,486.46 and 9,911.18 is: 14,845.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.14 : 31,486.46 = 9,911.18 : x
  2. Step 2: Convert to fraction form
    21,021.14/31,486.46 = 9,911.18/x
  3. Step 3: Cross multiply
    21,021.14x = 31,486.46 × 9,911.18
  4. Step 4: Simplify right side
    21,021.14x = 312,067,839.97
  5. Step 5: Solve for x
    x = 312,067,839.97/21,021.14
  6. Step 6: Final answer
    x = 14,845.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.