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Finding the Fourth Proportional to 7,321.05, 10,985.22 and 3,425.76

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Solution

The fourth proportional to 7,321.05, 10,985.22 and 3,425.76 is: 5,140.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.05 : 10,985.22 = 3,425.76 : x
  2. Step 2: Convert to fraction form
    7,321.05/10,985.22 = 3,425.76/x
  3. Step 3: Cross multiply
    7,321.05x = 10,985.22 × 3,425.76
  4. Step 4: Simplify right side
    7,321.05x = 37,632,727.27
  5. Step 5: Solve for x
    x = 37,632,727.27/7,321.05
  6. Step 6: Final answer
    x = 5,140.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.