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Finding the Fourth Proportional to 7,224.38, 9,969.64 and 3,912.38

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Solution

The fourth proportional to 7,224.38, 9,969.64 and 3,912.38 is: 5,399.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,224.38 : 9,969.64 = 3,912.38 : x
  2. Step 2: Convert to fraction form
    7,224.38/9,969.64 = 3,912.38/x
  3. Step 3: Cross multiply
    7,224.38x = 9,969.64 × 3,912.38
  4. Step 4: Simplify right side
    7,224.38x = 39,005,020.14
  5. Step 5: Solve for x
    x = 39,005,020.14/7,224.38
  6. Step 6: Final answer
    x = 5,399.08

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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.