Home / 13,179.06-18,186.39-7,209.54

Finding the Fourth Proportional to 13,179.06, 18,186.39 and 7,209.54

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Solution

The fourth proportional to 13,179.06, 18,186.39 and 7,209.54 is: 9,948.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.06 : 18,186.39 = 7,209.54 : x
  2. Step 2: Convert to fraction form
    13,179.06/18,186.39 = 7,209.54/x
  3. Step 3: Cross multiply
    13,179.06x = 18,186.39 × 7,209.54
  4. Step 4: Simplify right side
    13,179.06x = 131,115,506.16
  5. Step 5: Solve for x
    x = 131,115,506.16/13,179.06
  6. Step 6: Final answer
    x = 9,948.78

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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.