Home / 18,618.36-27,918.76-6,763.78

Finding the Fourth Proportional to 18,618.36, 27,918.76 and 6,763.78

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Solution

The fourth proportional to 18,618.36, 27,918.76 and 6,763.78 is: 10,142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.36 : 27,918.76 = 6,763.78 : x
  2. Step 2: Convert to fraction form
    18,618.36/27,918.76 = 6,763.78/x
  3. Step 3: Cross multiply
    18,618.36x = 27,918.76 × 6,763.78
  4. Step 4: Simplify right side
    18,618.36x = 188,836,350.51
  5. Step 5: Solve for x
    x = 188,836,350.51/18,618.36
  6. Step 6: Final answer
    x = 10,142.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.