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Finding the Fourth Proportional to 8,719.97, 11,872.57 and 8,692.29

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Solution

The fourth proportional to 8,719.97, 11,872.57 and 8,692.29 is: 11,834.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.97 : 11,872.57 = 8,692.29 : x
  2. Step 2: Convert to fraction form
    8,719.97/11,872.57 = 8,692.29/x
  3. Step 3: Cross multiply
    8,719.97x = 11,872.57 × 8,692.29
  4. Step 4: Simplify right side
    8,719.97x = 103,199,748.34
  5. Step 5: Solve for x
    x = 103,199,748.34/8,719.97
  6. Step 6: Final answer
    x = 11,834.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.