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Finding the Fourth Proportional to 6,969.12, 9,616.89 and 3,986.02

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Solution

The fourth proportional to 6,969.12, 9,616.89 and 3,986.02 is: 5,500.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,969.12 : 9,616.89 = 3,986.02 : x
  2. Step 2: Convert to fraction form
    6,969.12/9,616.89 = 3,986.02/x
  3. Step 3: Cross multiply
    6,969.12x = 9,616.89 × 3,986.02
  4. Step 4: Simplify right side
    6,969.12x = 38,333,115.88
  5. Step 5: Solve for x
    x = 38,333,115.88/6,969.12
  6. Step 6: Final answer
    x = 5,500.42

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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.