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Finding the Fourth Proportional to 3,999.96, 5,517.90 and 3,718.62

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Solution

The fourth proportional to 3,999.96, 5,517.90 and 3,718.62 is: 5,129.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.96 : 5,517.90 = 3,718.62 : x
  2. Step 2: Convert to fraction form
    3,999.96/5,517.90 = 3,718.62/x
  3. Step 3: Cross multiply
    3,999.96x = 5,517.90 × 3,718.62
  4. Step 4: Simplify right side
    3,999.96x = 20,518,973.30
  5. Step 5: Solve for x
    x = 20,518,973.30/3,999.96
  6. Step 6: Final answer
    x = 5,129.79

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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.