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Finding the Fourth Proportional to 39,692.82, 54,778.04 and 21,787.64

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Solution

The fourth proportional to 39,692.82, 54,778.04 and 21,787.64 is: 30,068.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,692.82 : 54,778.04 = 21,787.64 : x
  2. Step 2: Convert to fraction form
    39,692.82/54,778.04 = 21,787.64/x
  3. Step 3: Cross multiply
    39,692.82x = 54,778.04 × 21,787.64
  4. Step 4: Simplify right side
    39,692.82x = 1,193,484,215.43
  5. Step 5: Solve for x
    x = 1,193,484,215.43/39,692.82
  6. Step 6: Final answer
    x = 30,068.01

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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.