Home / 13,613.70-18,786.80-7,645.25

Finding the Fourth Proportional to 13,613.70, 18,786.80 and 7,645.25

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Solution

The fourth proportional to 13,613.70, 18,786.80 and 7,645.25 is: 10,550.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.70 : 18,786.80 = 7,645.25 : x
  2. Step 2: Convert to fraction form
    13,613.70/18,786.80 = 7,645.25/x
  3. Step 3: Cross multiply
    13,613.70x = 18,786.80 × 7,645.25
  4. Step 4: Simplify right side
    13,613.70x = 143,629,689.92
  5. Step 5: Solve for x
    x = 143,629,689.92/13,613.70
  6. Step 6: Final answer
    x = 10,550.37

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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.