Home / 7,142.50-9,856.94-3,998.62

Finding the Fourth Proportional to 7,142.50, 9,856.94 and 3,998.62

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Solution

The fourth proportional to 7,142.50, 9,856.94 and 3,998.62 is: 5,518.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,142.50 : 9,856.94 = 3,998.62 : x
  2. Step 2: Convert to fraction form
    7,142.50/9,856.94 = 3,998.62/x
  3. Step 3: Cross multiply
    7,142.50x = 9,856.94 × 3,998.62
  4. Step 4: Simplify right side
    7,142.50x = 39,414,157.42
  5. Step 5: Solve for x
    x = 39,414,157.42/7,142.50
  6. Step 6: Final answer
    x = 5,518.26

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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.