Home / 12,505.87-18,759.78-4,185.91

Finding the Fourth Proportional to 12,505.87, 18,759.78 and 4,185.91

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Solution

The fourth proportional to 12,505.87, 18,759.78 and 4,185.91 is: 6,279.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.87 : 18,759.78 = 4,185.91 : x
  2. Step 2: Convert to fraction form
    12,505.87/18,759.78 = 4,185.91/x
  3. Step 3: Cross multiply
    12,505.87x = 18,759.78 × 4,185.91
  4. Step 4: Simplify right side
    12,505.87x = 78,526,750.70
  5. Step 5: Solve for x
    x = 78,526,750.70/12,505.87
  6. Step 6: Final answer
    x = 6,279.19

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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.