Home / 8,118.87-12,177.09-3,191.91

Finding the Fourth Proportional to 8,118.87, 12,177.09 and 3,191.91

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Solution

The fourth proportional to 8,118.87, 12,177.09 and 3,191.91 is: 4,787.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.87 : 12,177.09 = 3,191.91 : x
  2. Step 2: Convert to fraction form
    8,118.87/12,177.09 = 3,191.91/x
  3. Step 3: Cross multiply
    8,118.87x = 12,177.09 × 3,191.91
  4. Step 4: Simplify right side
    8,118.87x = 38,868,175.34
  5. Step 5: Solve for x
    x = 38,868,175.34/8,118.87
  6. Step 6: Final answer
    x = 4,787.39

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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.