Home / 20,321.88-28,046.52-11,371.65

Finding the Fourth Proportional to 20,321.88, 28,046.52 and 11,371.65

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Solution

The fourth proportional to 20,321.88, 28,046.52 and 11,371.65 is: 15,694.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.88 : 28,046.52 = 11,371.65 : x
  2. Step 2: Convert to fraction form
    20,321.88/28,046.52 = 11,371.65/x
  3. Step 3: Cross multiply
    20,321.88x = 28,046.52 × 11,371.65
  4. Step 4: Simplify right side
    20,321.88x = 318,935,209.16
  5. Step 5: Solve for x
    x = 318,935,209.16/20,321.88
  6. Step 6: Final answer
    x = 15,694.18

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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.