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Finding the Fourth Proportional to 39,912.82, 55,082.16 and 22,007.79

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Solution

The fourth proportional to 39,912.82, 55,082.16 and 22,007.79 is: 30,372.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,912.82 : 55,082.16 = 22,007.79 : x
  2. Step 2: Convert to fraction form
    39,912.82/55,082.16 = 22,007.79/x
  3. Step 3: Cross multiply
    39,912.82x = 55,082.16 × 22,007.79
  4. Step 4: Simplify right side
    39,912.82x = 1,212,236,610.03
  5. Step 5: Solve for x
    x = 1,212,236,610.03/39,912.82
  6. Step 6: Final answer
    x = 30,372.11

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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.