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Finding the Fourth Proportional to 39,797.16, 54,921.42 and 21,892.92

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Solution

The fourth proportional to 39,797.16, 54,921.42 and 21,892.92 is: 30,212.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,797.16 : 54,921.42 = 21,892.92 : x
  2. Step 2: Convert to fraction form
    39,797.16/54,921.42 = 21,892.92/x
  3. Step 3: Cross multiply
    39,797.16x = 54,921.42 × 21,892.92
  4. Step 4: Simplify right side
    39,797.16x = 1,202,390,254.35
  5. Step 5: Solve for x
    x = 1,202,390,254.35/39,797.16
  6. Step 6: Final answer
    x = 30,212.97

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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.