Home / 13,209.75-18,229.46-7,620.75

Finding the Fourth Proportional to 13,209.75, 18,229.46 and 7,620.75

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Solution

The fourth proportional to 13,209.75, 18,229.46 and 7,620.75 is: 10,516.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.75 : 18,229.46 = 7,620.75 : x
  2. Step 2: Convert to fraction form
    13,209.75/18,229.46 = 7,620.75/x
  3. Step 3: Cross multiply
    13,209.75x = 18,229.46 × 7,620.75
  4. Step 4: Simplify right side
    13,209.75x = 138,922,119.19
  5. Step 5: Solve for x
    x = 138,922,119.19/13,209.75
  6. Step 6: Final answer
    x = 10,516.64

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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.