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Finding the Fourth Proportional to 39,692.88, 54,776.84 and 21,789.56

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Solution

The fourth proportional to 39,692.88, 54,776.84 and 21,789.56 is: 30,069.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,692.88 : 54,776.84 = 21,789.56 : x
  2. Step 2: Convert to fraction form
    39,692.88/54,776.84 = 21,789.56/x
  3. Step 3: Cross multiply
    39,692.88x = 54,776.84 × 21,789.56
  4. Step 4: Simplify right side
    39,692.88x = 1,193,563,241.79
  5. Step 5: Solve for x
    x = 1,193,563,241.79/39,692.88
  6. Step 6: Final answer
    x = 30,069.96

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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.