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Finding the Fourth Proportional to 20,417.44, 30,634.44 and 13,839.88

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Solution

The fourth proportional to 20,417.44, 30,634.44 and 13,839.88 is: 20,765.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,417.44 : 30,634.44 = 13,839.88 : x
  2. Step 2: Convert to fraction form
    20,417.44/30,634.44 = 13,839.88/x
  3. Step 3: Cross multiply
    20,417.44x = 30,634.44 × 13,839.88
  4. Step 4: Simplify right side
    20,417.44x = 423,976,973.47
  5. Step 5: Solve for x
    x = 423,976,973.47/20,417.44
  6. Step 6: Final answer
    x = 20,765.43

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1.5x scale

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.