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Finding the Fourth Proportional to 3,991.52, 5,992.68 and 3,116.72

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Solution

The fourth proportional to 3,991.52, 5,992.68 and 3,116.72 is: 4,679.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.52 : 5,992.68 = 3,116.72 : x
  2. Step 2: Convert to fraction form
    3,991.52/5,992.68 = 3,116.72/x
  3. Step 3: Cross multiply
    3,991.52x = 5,992.68 × 3,116.72
  4. Step 4: Simplify right side
    3,991.52x = 18,677,505.61
  5. Step 5: Solve for x
    x = 18,677,505.61/3,991.52
  6. Step 6: Final answer
    x = 4,679.30

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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.