Home / 5,109.72-7,664.75-3,998.11

Finding the Fourth Proportional to 5,109.72, 7,664.75 and 3,998.11

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Solution

The fourth proportional to 5,109.72, 7,664.75 and 3,998.11 is: 5,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.72 : 7,664.75 = 3,998.11 : x
  2. Step 2: Convert to fraction form
    5,109.72/7,664.75 = 3,998.11/x
  3. Step 3: Cross multiply
    5,109.72x = 7,664.75 × 3,998.11
  4. Step 4: Simplify right side
    5,109.72x = 30,644,515.08
  5. Step 5: Solve for x
    x = 30,644,515.08/5,109.72
  6. Step 6: Final answer
    x = 5,997.30

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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.