Home / 18,776.36-28,163.12-7,680.03

Finding the Fourth Proportional to 18,776.36, 28,163.12 and 7,680.03

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Solution

The fourth proportional to 18,776.36, 28,163.12 and 7,680.03 is: 11,519.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.36 : 28,163.12 = 7,680.03 : x
  2. Step 2: Convert to fraction form
    18,776.36/28,163.12 = 7,680.03/x
  3. Step 3: Cross multiply
    18,776.36x = 28,163.12 × 7,680.03
  4. Step 4: Simplify right side
    18,776.36x = 216,293,568.09
  5. Step 5: Solve for x
    x = 216,293,568.09/18,776.36
  6. Step 6: Final answer
    x = 11,519.47

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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.