Home / 13,179.30-18,186.66-7,209.78

Finding the Fourth Proportional to 13,179.30, 18,186.66 and 7,209.78

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Solution

The fourth proportional to 13,179.30, 18,186.66 and 7,209.78 is: 9,949.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.30 : 18,186.66 = 7,209.78 : x
  2. Step 2: Convert to fraction form
    13,179.30/18,186.66 = 7,209.78/x
  3. Step 3: Cross multiply
    13,179.30x = 18,186.66 × 7,209.78
  4. Step 4: Simplify right side
    13,179.30x = 131,121,817.53
  5. Step 5: Solve for x
    x = 131,121,817.53/13,179.30
  6. Step 6: Final answer
    x = 9,949.07

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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.