Home / 39,631.21-54,694.52-21,729.63

Finding the Fourth Proportional to 39,631.21, 54,694.52 and 21,729.63

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Solution

The fourth proportional to 39,631.21, 54,694.52 and 21,729.63 is: 29,988.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,631.21 : 54,694.52 = 21,729.63 : x
  2. Step 2: Convert to fraction form
    39,631.21/54,694.52 = 21,729.63/x
  3. Step 3: Cross multiply
    39,631.21x = 54,694.52 × 21,729.63
  4. Step 4: Simplify right side
    39,631.21x = 1,188,491,682.63
  5. Step 5: Solve for x
    x = 1,188,491,682.63/39,631.21
  6. Step 6: Final answer
    x = 29,988.78

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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.