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Finding the Fourth Proportional to 7,107.96, 9,809.28 and 3,964.08

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Solution

The fourth proportional to 7,107.96, 9,809.28 and 3,964.08 is: 5,470.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,107.96 : 9,809.28 = 3,964.08 : x
  2. Step 2: Convert to fraction form
    7,107.96/9,809.28 = 3,964.08/x
  3. Step 3: Cross multiply
    7,107.96x = 9,809.28 × 3,964.08
  4. Step 4: Simplify right side
    7,107.96x = 38,884,770.66
  5. Step 5: Solve for x
    x = 38,884,770.66/7,107.96
  6. Step 6: Final answer
    x = 5,470.60

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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.