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Finding the Fourth Proportional to 8,692.72, 12,005.81 and 5,855.17

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Solution

The fourth proportional to 8,692.72, 12,005.81 and 5,855.17 is: 8,086.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.72 : 12,005.81 = 5,855.17 : x
  2. Step 2: Convert to fraction form
    8,692.72/12,005.81 = 5,855.17/x
  3. Step 3: Cross multiply
    8,692.72x = 12,005.81 × 5,855.17
  4. Step 4: Simplify right side
    8,692.72x = 70,296,029.26
  5. Step 5: Solve for x
    x = 70,296,029.26/8,692.72
  6. Step 6: Final answer
    x = 8,086.77

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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.