Home / 21,687.75-29,930.92-13,727.07

Finding the Fourth Proportional to 21,687.75, 29,930.92 and 13,727.07

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Solution

The fourth proportional to 21,687.75, 29,930.92 and 13,727.07 is: 18,944.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687.75 : 29,930.92 = 13,727.07 : x
  2. Step 2: Convert to fraction form
    21,687.75/29,930.92 = 13,727.07/x
  3. Step 3: Cross multiply
    21,687.75x = 29,930.92 × 13,727.07
  4. Step 4: Simplify right side
    21,687.75x = 410,863,799.69
  5. Step 5: Solve for x
    x = 410,863,799.69/21,687.75
  6. Step 6: Final answer
    x = 18,944.51

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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.