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Finding the Fourth Proportional to 6,963.12, 9,609.28 and 3,979.12

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Solution

The fourth proportional to 6,963.12, 9,609.28 and 3,979.12 is: 5,491.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,963.12 : 9,609.28 = 3,979.12 : x
  2. Step 2: Convert to fraction form
    6,963.12/9,609.28 = 3,979.12/x
  3. Step 3: Cross multiply
    6,963.12x = 9,609.28 × 3,979.12
  4. Step 4: Simplify right side
    6,963.12x = 38,236,478.23
  5. Step 5: Solve for x
    x = 38,236,478.23/6,963.12
  6. Step 6: Final answer
    x = 5,491.29

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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.