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Finding the Fourth Proportional to 39,691.12, 59,538 and 19,958.88

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Solution

The fourth proportional to 39,691.12, 59,538 and 19,958.88 is: 29,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,691.12 : 59,538 = 19,958.88 : x
  2. Step 2: Convert to fraction form
    39,691.12/59,538 = 19,958.88/x
  3. Step 3: Cross multiply
    39,691.12x = 59,538 × 19,958.88
  4. Step 4: Simplify right side
    39,691.12x = 1,188,311,797.44
  5. Step 5: Solve for x
    x = 1,188,311,797.44/39,691.12
  6. Step 6: Final answer
    x = 29,938.98

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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.