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Finding the Fourth Proportional to 12,407,791.84, 18,611,692.08 and 3,888,789.28

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Solution

The fourth proportional to 12,407,791.84, 18,611,692.08 and 3,888,789.28 is: 5,833,185.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,407,791.84 : 18,611,692.08 = 3,888,789.28 : x
  2. Step 2: Convert to fraction form
    12,407,791.84/18,611,692.08 = 3,888,789.28/x
  3. Step 3: Cross multiply
    12,407,791.84x = 18,611,692.08 × 3,888,789.28
  4. Step 4: Simplify right side
    12,407,791.84x = 72,376,948,643,364.89
  5. Step 5: Solve for x
    x = 72,376,948,643,364.89/12,407,791.84
  6. Step 6: Final answer
    x = 5,833,185.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.