Home / 21,824.39-30,108.35-13,743.69

Finding the Fourth Proportional to 21,824.39, 30,108.35 and 13,743.69

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Solution

The fourth proportional to 21,824.39, 30,108.35 and 13,743.69 is: 18,960.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,824.39 : 30,108.35 = 13,743.69 : x
  2. Step 2: Convert to fraction form
    21,824.39/30,108.35 = 13,743.69/x
  3. Step 3: Cross multiply
    21,824.39x = 30,108.35 × 13,743.69
  4. Step 4: Simplify right side
    21,824.39x = 413,799,760.09
  5. Step 5: Solve for x
    x = 413,799,760.09/21,824.39
  6. Step 6: Final answer
    x = 18,960.43

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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.