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Finding the Fourth Proportional to 39,700.84, 54,786.92 and 21,796.14

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Solution

The fourth proportional to 39,700.84, 54,786.92 and 21,796.14 is: 30,078.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,700.84 : 54,786.92 = 21,796.14 : x
  2. Step 2: Convert to fraction form
    39,700.84/54,786.92 = 21,796.14/x
  3. Step 3: Cross multiply
    39,700.84x = 54,786.92 × 21,796.14
  4. Step 4: Simplify right side
    39,700.84x = 1,194,143,378.49
  5. Step 5: Solve for x
    x = 1,194,143,378.49/39,700.84
  6. Step 6: Final answer
    x = 30,078.54

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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.