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Finding the Fourth Proportional to 7,322.70, 10,105.30 and 3,965.50

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Solution

The fourth proportional to 7,322.70, 10,105.30 and 3,965.50 is: 5,472.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,322.70 : 10,105.30 = 3,965.50 : x
  2. Step 2: Convert to fraction form
    7,322.70/10,105.30 = 3,965.50/x
  3. Step 3: Cross multiply
    7,322.70x = 10,105.30 × 3,965.50
  4. Step 4: Simplify right side
    7,322.70x = 40,072,567.15
  5. Step 5: Solve for x
    x = 40,072,567.15/7,322.70
  6. Step 6: Final answer
    x = 5,472.38

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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.