Home / 13,081.80-18,100.42-11,406.70

Finding the Fourth Proportional to 13,081.80, 18,100.42 and 11,406.70

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Solution

The fourth proportional to 13,081.80, 18,100.42 and 11,406.70 is: 15,782.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,081.80 : 18,100.42 = 11,406.70 : x
  2. Step 2: Convert to fraction form
    13,081.80/18,100.42 = 11,406.70/x
  3. Step 3: Cross multiply
    13,081.80x = 18,100.42 × 11,406.70
  4. Step 4: Simplify right side
    13,081.80x = 206,466,007.20
  5. Step 5: Solve for x
    x = 206,466,007.20/13,081.80
  6. Step 6: Final answer
    x = 15,782.69

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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.