Home / 6,991.28-9,647.87-4,160.03

Finding the Fourth Proportional to 6,991.28, 9,647.87 and 4,160.03

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Solution

The fourth proportional to 6,991.28, 9,647.87 and 4,160.03 is: 5,740.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.28 : 9,647.87 = 4,160.03 : x
  2. Step 2: Convert to fraction form
    6,991.28/9,647.87 = 4,160.03/x
  3. Step 3: Cross multiply
    6,991.28x = 9,647.87 × 4,160.03
  4. Step 4: Simplify right side
    6,991.28x = 40,135,407.84
  5. Step 5: Solve for x
    x = 40,135,407.84/6,991.28
  6. Step 6: Final answer
    x = 5,740.78

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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.