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Finding the Fourth Proportional to 39,692.21, 54,775.04 and 21,787.52

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Solution

The fourth proportional to 39,692.21, 54,775.04 and 21,787.52 is: 30,066.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,692.21 : 54,775.04 = 21,787.52 : x
  2. Step 2: Convert to fraction form
    39,692.21/54,775.04 = 21,787.52/x
  3. Step 3: Cross multiply
    39,692.21x = 54,775.04 × 21,787.52
  4. Step 4: Simplify right side
    39,692.21x = 1,193,411,896.69
  5. Step 5: Solve for x
    x = 1,193,411,896.69/39,692.21
  6. Step 6: Final answer
    x = 30,066.66

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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.