Home / 21,306.47-31,910.49-20,568.38

Finding the Fourth Proportional to 21,306.47, 31,910.49 and 20,568.38

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Solution

The fourth proportional to 21,306.47, 31,910.49 and 20,568.38 is: 30,805.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.47 : 31,910.49 = 20,568.38 : x
  2. Step 2: Convert to fraction form
    21,306.47/31,910.49 = 20,568.38/x
  3. Step 3: Cross multiply
    21,306.47x = 31,910.49 × 20,568.38
  4. Step 4: Simplify right side
    21,306.47x = 656,346,924.75
  5. Step 5: Solve for x
    x = 656,346,924.75/21,306.47
  6. Step 6: Final answer
    x = 30,805.06

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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.