Home / 20,839.29-28,758.03-11,278.99

Finding the Fourth Proportional to 20,839.29, 28,758.03 and 11,278.99

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Solution

The fourth proportional to 20,839.29, 28,758.03 and 11,278.99 is: 15,564.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.29 : 28,758.03 = 11,278.99 : x
  2. Step 2: Convert to fraction form
    20,839.29/28,758.03 = 11,278.99/x
  3. Step 3: Cross multiply
    20,839.29x = 28,758.03 × 11,278.99
  4. Step 4: Simplify right side
    20,839.29x = 324,361,482.04
  5. Step 5: Solve for x
    x = 324,361,482.04/20,839.29
  6. Step 6: Final answer
    x = 15,564.90

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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.