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Finding the Fourth Proportional to 12,692.93, 19,061.18 and 7,791.35

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Solution

The fourth proportional to 12,692.93, 19,061.18 and 7,791.35 is: 11,700.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.93 : 19,061.18 = 7,791.35 : x
  2. Step 2: Convert to fraction form
    12,692.93/19,061.18 = 7,791.35/x
  3. Step 3: Cross multiply
    12,692.93x = 19,061.18 × 7,791.35
  4. Step 4: Simplify right side
    12,692.93x = 148,512,285.84
  5. Step 5: Solve for x
    x = 148,512,285.84/12,692.93
  6. Step 6: Final answer
    x = 11,700.39

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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.