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Finding the Fourth Proportional to 5,318.60, 7,990.28 and 5,109.48

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Solution

The fourth proportional to 5,318.60, 7,990.28 and 5,109.48 is: 7,676.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.60 : 7,990.28 = 5,109.48 : x
  2. Step 2: Convert to fraction form
    5,318.60/7,990.28 = 5,109.48/x
  3. Step 3: Cross multiply
    5,318.60x = 7,990.28 × 5,109.48
  4. Step 4: Simplify right side
    5,318.60x = 40,826,175.85
  5. Step 5: Solve for x
    x = 40,826,175.85/5,318.60
  6. Step 6: Final answer
    x = 7,676.11

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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.