Home / 11,172.87-15,414.27-6,391.85

Finding the Fourth Proportional to 11,172.87, 15,414.27 and 6,391.85

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Solution

The fourth proportional to 11,172.87, 15,414.27 and 6,391.85 is: 8,818.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172.87 : 15,414.27 = 6,391.85 : x
  2. Step 2: Convert to fraction form
    11,172.87/15,414.27 = 6,391.85/x
  3. Step 3: Cross multiply
    11,172.87x = 15,414.27 × 6,391.85
  4. Step 4: Simplify right side
    11,172.87x = 98,525,624.63
  5. Step 5: Solve for x
    x = 98,525,624.63/11,172.87
  6. Step 6: Final answer
    x = 8,818.29

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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.