Home / 13,613.58-18,786.80-7,645.14

Finding the Fourth Proportional to 13,613.58, 18,786.80 and 7,645.14

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Solution

The fourth proportional to 13,613.58, 18,786.80 and 7,645.14 is: 10,550.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.58 : 18,786.80 = 7,645.14 : x
  2. Step 2: Convert to fraction form
    13,613.58/18,786.80 = 7,645.14/x
  3. Step 3: Cross multiply
    13,613.58x = 18,786.80 × 7,645.14
  4. Step 4: Simplify right side
    13,613.58x = 143,627,716.15
  5. Step 5: Solve for x
    x = 143,627,716.15/13,613.58
  6. Step 6: Final answer
    x = 10,550.33

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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.