Home / 39,692.98-54,777-21,789.64

Finding the Fourth Proportional to 39,692.98, 54,777 and 21,789.64

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Solution

The fourth proportional to 39,692.98, 54,777 and 21,789.64 is: 30,070.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,692.98 : 54,777 = 21,789.64 : x
  2. Step 2: Convert to fraction form
    39,692.98/54,777 = 21,789.64/x
  3. Step 3: Cross multiply
    39,692.98x = 54,777 × 21,789.64
  4. Step 4: Simplify right side
    39,692.98x = 1,193,571,110.28
  5. Step 5: Solve for x
    x = 1,193,571,110.28/39,692.98
  6. Step 6: Final answer
    x = 30,070.08

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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.