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Finding the Fourth Proportional to 11,787.05, 17,692.20 and 8,658.28

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Solution

The fourth proportional to 11,787.05, 17,692.20 and 8,658.28 is: 12,995.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,787.05 : 17,692.20 = 8,658.28 : x
  2. Step 2: Convert to fraction form
    11,787.05/17,692.20 = 8,658.28/x
  3. Step 3: Cross multiply
    11,787.05x = 17,692.20 × 8,658.28
  4. Step 4: Simplify right side
    11,787.05x = 153,184,021.42
  5. Step 5: Solve for x
    x = 153,184,021.42/11,787.05
  6. Step 6: Final answer
    x = 12,995.96

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1.5x scale

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.