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Finding the Fourth Proportional to 7,158.85, 9,879.19 and 4,015.10

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Solution

The fourth proportional to 7,158.85, 9,879.19 and 4,015.10 is: 5,540.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,158.85 : 9,879.19 = 4,015.10 : x
  2. Step 2: Convert to fraction form
    7,158.85/9,879.19 = 4,015.10/x
  3. Step 3: Cross multiply
    7,158.85x = 9,879.19 × 4,015.10
  4. Step 4: Simplify right side
    7,158.85x = 39,665,915.69
  5. Step 5: Solve for x
    x = 39,665,915.69/7,158.85
  6. Step 6: Final answer
    x = 5,540.83

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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.