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Finding the Fourth Proportional to 8,692.61, 13,033.16 and 3,145.22

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Solution

The fourth proportional to 8,692.61, 13,033.16 and 3,145.22 is: 4,715.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.61 : 13,033.16 = 3,145.22 : x
  2. Step 2: Convert to fraction form
    8,692.61/13,033.16 = 3,145.22/x
  3. Step 3: Cross multiply
    8,692.61x = 13,033.16 × 3,145.22
  4. Step 4: Simplify right side
    8,692.61x = 40,992,172.35
  5. Step 5: Solve for x
    x = 40,992,172.35/8,692.61
  6. Step 6: Final answer
    x = 4,715.75

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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.