Home / 8,540.81-12,786.30-5,243.91

Finding the Fourth Proportional to 8,540.81, 12,786.30 and 5,243.91

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Solution

The fourth proportional to 8,540.81, 12,786.30 and 5,243.91 is: 7,850.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.81 : 12,786.30 = 5,243.91 : x
  2. Step 2: Convert to fraction form
    8,540.81/12,786.30 = 5,243.91/x
  3. Step 3: Cross multiply
    8,540.81x = 12,786.30 × 5,243.91
  4. Step 4: Simplify right side
    8,540.81x = 67,050,206.43
  5. Step 5: Solve for x
    x = 67,050,206.43/8,540.81
  6. Step 6: Final answer
    x = 7,850.57

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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.