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Finding the Fourth Proportional to 7,325.76, 10,109.68 and 3,968.64

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Solution

The fourth proportional to 7,325.76, 10,109.68 and 3,968.64 is: 5,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,325.76 : 10,109.68 = 3,968.64 : x
  2. Step 2: Convert to fraction form
    7,325.76/10,109.68 = 3,968.64/x
  3. Step 3: Cross multiply
    7,325.76x = 10,109.68 × 3,968.64
  4. Step 4: Simplify right side
    7,325.76x = 40,121,680.44
  5. Step 5: Solve for x
    x = 40,121,680.44/7,325.76
  6. Step 6: Final answer
    x = 5,476.79

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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.