Home / 13,544.36-18,690.64-7,879.12

Finding the Fourth Proportional to 13,544.36, 18,690.64 and 7,879.12

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Solution

The fourth proportional to 13,544.36, 18,690.64 and 7,879.12 is: 10,872.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,544.36 : 18,690.64 = 7,879.12 : x
  2. Step 2: Convert to fraction form
    13,544.36/18,690.64 = 7,879.12/x
  3. Step 3: Cross multiply
    13,544.36x = 18,690.64 × 7,879.12
  4. Step 4: Simplify right side
    13,544.36x = 147,265,795.44
  5. Step 5: Solve for x
    x = 147,265,795.44/13,544.36
  6. Step 6: Final answer
    x = 10,872.85

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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.