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Finding the Fourth Proportional to 12,112.80, 18,166.80 and 5,872.80

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Solution

The fourth proportional to 12,112.80, 18,166.80 and 5,872.80 is: 8,808.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.80 : 18,166.80 = 5,872.80 : x
  2. Step 2: Convert to fraction form
    12,112.80/18,166.80 = 5,872.80/x
  3. Step 3: Cross multiply
    12,112.80x = 18,166.80 × 5,872.80
  4. Step 4: Simplify right side
    12,112.80x = 106,689,983.04
  5. Step 5: Solve for x
    x = 106,689,983.04/12,112.80
  6. Step 6: Final answer
    x = 8,808.04

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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.