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Finding the Fourth Proportional to 6,990.38, 9,646.72 and 4,195.88

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Solution

The fourth proportional to 6,990.38, 9,646.72 and 4,195.88 is: 5,790.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.38 : 9,646.72 = 4,195.88 : x
  2. Step 2: Convert to fraction form
    6,990.38/9,646.72 = 4,195.88/x
  3. Step 3: Cross multiply
    6,990.38x = 9,646.72 × 4,195.88
  4. Step 4: Simplify right side
    6,990.38x = 40,476,420.79
  5. Step 5: Solve for x
    x = 40,476,420.79/6,990.38
  6. Step 6: Final answer
    x = 5,790.31

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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.